Quick Answer
The Wisdom of the Enneagram is Don Riso and Russ Hudson's standard reference on the nine types, and its real contribution is the Levels of Development: nine gradations within each type from healthy to unhealthy. Knowing someone's number matters far less than knowing their level.
Key Takeaways
- The Levels are the innovation: a vertical axis added to the nine horizontal types, and the single most useful idea in Enneagram literature.
- A healthy Eight and an unhealthy Eight differ more than an average Eight and an average Two, which makes level the more informative variable.
- The validity research is mixed: adequate internal consistency, but factor analysis has not supported the nine types as distinct constructs. Heuristic value is much better supported.
- The origin story is younger than claimed: Gurdjieff taught the figure as cosmology; the personality typology comes from Ichazo and Naranjo from the 1950s onward.
- Rudolf Steiner connection: his four temperaments were taught as one-sidedness to be balanced, never as identity to be claimed, which is a safeguard the Enneagram does not build in.
🕑 15 min read
The Levels of Development
Most Enneagram books describe nine types. This one describes nine types across nine levels each, and that second dimension is why it remains the reference work three decades on.
Riso and Hudson's proposal is that each type exists as a range rather than as a fixed description. Within any type there are healthy levels, where the type's characteristic capacities operate with the least defence; average levels, where the same strategy has hardened into habit and is running whether or not the situation calls for it; and unhealthy levels, where the strategy under sufficient pressure becomes destructive to the person and to others.
Take the Two, the type organised around meeting others' needs. At the healthy levels this is genuine attention to other people, given freely, with the giver's own needs acknowledged rather than hidden. At the average levels it becomes giving that expects return, help that creates obligation, an identity built on being needed. At the unhealthy levels it becomes coercion through care, with the person unable to see that what they call love has become a claim on someone.
Same type. Three different people, and the third would not recognise themselves in a description of the first.
The problem the Levels solve
Every personality system has the same weakness: the descriptions have to cover both the flattering and the unflattering version of a type, so they end up either generous, in which case they are useless for self-knowledge, or harsh, in which case nobody accepts their own. Riso and Hudson resolve this by making the range explicit. The generous description and the harsh one are both accurate, of the same type, at different levels. That is a real structural fix and it is the reason their type descriptions can afford to be unsparing.
Why the Vertical Axis Changes Everything
The practical consequence is worth stating plainly, because it inverts how most people use the system.
If you know someone is a Type Eight, you know very little. A healthy Eight is a protective, direct person who uses their strength on behalf of people who lack it. An unhealthy Eight is domineering and vengeful and experiences vulnerability as a threat to be destroyed. Those two are far more different from each other than an average Eight is from an average Two.
Which means the level is the more informative variable, and it is the one everyone ignores. Conversations about the Enneagram are almost entirely about which number someone is. Almost none are about where in their range they have been sitting lately, which is the question that would actually tell you something.
The other consequence is that the level moves. Types are held to be fixed; levels are not. A person under sustained stress slides down their own range, and the same person after a good year operates several levels higher without having changed type at all. That makes the framework a description of condition rather than of essence, which is far more useful and considerably less flattering.
Practice: locate the level, not the number
Take whichever type you believe you are, and read all nine levels of it in one sitting rather than only the summary. Then identify, honestly, which level describes how you have behaved in the past month. Most people find they know immediately and did not want to look. Then do the same for a period in your life that went well, and note the gap. That gap is the actual working material, and it is invisible if you only ever ask which number you are.
Where the System Actually Comes From
The Enneagram is regularly presented as ancient wisdom, and the history is more recent and better documented than that.
The nine-pointed figure enters modern circulation through G.I. Gurdjieff, who taught it in the early twentieth century as a cosmological diagram, a way of representing process and the law of octaves. It was not a personality system, and Gurdjieff never used it as one.
The application to nine character types comes from Oscar Ichazo, working from the 1950s, and was developed further by the psychiatrist Claudio Naranjo, who brought it to the United States and connected it to clinical categories. Nearly everything a contemporary reader recognises as the Enneagram dates from that lineage, which makes the personality system roughly seventy years old rather than ancient.
Claims that the typology descends from Sufi orders or the desert fathers are not documented, and the people making them are generally repeating an origin story rather than a source. This matters less than it might: a framework can be recent and still useful. It matters for honesty, and for a reader deciding how much weight to put on the claim that many traditions independently arrived at this.
The figure in its original use is covered in the Fourth Way of Gurdjieff and in Ouspensky's account of the system.
What the Research Found
Riso and Hudson developed a questionnaire, the Riso-Hudson Enneagram Type Indicator, and it has been examined. The results are worth knowing precisely rather than in summary, because both camps misreport them.
Internal consistency is adequate. The items intended to measure a given type do hang together statistically, which means the instrument is measuring something coherent rather than noise.
Construct validity is where it becomes difficult. Factor analysis has not supported the claim that the items measure nine distinct types. Correlational and canonical analyses have produced mixed support. In plain terms: the questionnaire measures something, and the evidence that what it measures is nine separate natural categories is weak.
Support for the system's heuristic value is considerably stronger. It helps people notice patterns in themselves and others that they would not otherwise have articulated, and it gives them vocabulary for those patterns.
Holding both halves of that
The finding is neither a vindication nor a debunking, and the temptation is to hear it as whichever you were already inclined toward. What it actually supports is this: the Enneagram is a good lens and a poor taxonomy. It reliably helps people see something, and the nine boxes are probably not carving the world at its joints. Our reading is that this makes the Levels more important rather than less, because a description of how defended a person currently is does not depend on the nine categories being real in the way a claim about type membership does. The vertical axis survives the criticism that the horizontal one does not.
The Passions and the Spiritual Layer
Underneath the psychology sits a religious inheritance the popular use has largely discarded, and Riso and Hudson keep it, which is part of why their book is longer than its competitors.
Each type is associated with a passion, a characteristic distortion of the will, and these are the classical deadly sins with two additions: anger, pride, deceit, envy, avarice, fear, gluttony, lust and sloth. Against each passion stands a virtue, and beyond the virtue a holy idea, which is the perception a person of that type loses when the passion takes hold.
That structure is doing something the personality material alone cannot. The passion is not a flaw in a person; it is described as a fixation that closes down a specific way of seeing. The Five's avarice is not stinginess with money but a hoarding of inner resources that follows from having lost the perception that the world will supply anything. The remedy in this scheme is not better behaviour but the restoration of the missing perception, and the behaviour follows from that.
Whether a reader accepts the metaphysics or not, the move is worth noticing, because it changes the direction of the work. Modern typology asks what you are like and how to manage it. This layer asks what you have stopped being able to see, which is a considerably more demanding question and closer to what a contemplative tradition would ask.
Why the spiritual layer keeps getting dropped
Corporate and therapeutic uses of the Enneagram strip this material out, and the reason is obvious enough: a workplace training cannot tell people their fundamental orientation is a spiritual distortion. What remains after the removal is a personality inventory with nine boxes, which is exactly the part the validity research handles least well. Our reading is that the system is stronger, not weaker, in its religious form, because in that form it never claimed to be a taxonomy of persons. It claimed to describe nine ways of losing sight of something, which is a claim about a process rather than about a category, and processes do not need to carve nature at its joints to be real.
The Identity Trap
Every serious teacher in this field warns about the same failure, and the popular use ignores the warning entirely.
The system is useful when a type names a defensive strategy you can watch operating and decline to follow. It becomes actively harmful when the number becomes an identity, because at that point it supplies an explanation for behaviour that removes the requirement to change it. I am a Four, so of course I withdraw. I am an Eight, so of course I was blunt with you.
That move converts a diagnostic instrument into a permission structure, and it is extremely common. It is also, in its way, the exact opposite of what the Levels are for. Riso and Hudson's entire framework is built to show that the type does not determine the behaviour, since the same type behaves radically differently at different levels. A person who uses their number to excuse conduct has taken the one part of the system that is fixed and used it to justify the part that is not.
A test for whether you are using it well
Ask what the framework has cost you. A typology being used for self-knowledge produces uncomfortable recognitions and occasional changes of behaviour. A typology being used for identity produces a pleasant sense of being understood and no change at all. If your type has never once required you to do something you did not want to do, it is functioning as decoration.
Temperament as Something to Work Against
Western esoteric practice has its own typology, and the difference in how it was taught is instructive.
Rudolf Steiner made extensive use of the four classical temperaments, choleric, sanguine, melancholic and phlegmatic, particularly in Waldorf education. A teacher was expected to identify a child's temperament, and the purpose was specific: to supply what the temperament lacked and to prevent the child from being wholly determined by it.
The framing is the important part. Temperament in Steiner's use is one-sidedness. It is the direction you will lean without effort, and the work is toward balance rather than toward expression. A melancholic child is not encouraged to be more melancholic on the grounds of authenticity. The whole point of naming it is to know which counterweight is needed.
Nothing in the Enneagram forbids that reading, and nothing in it enforces the reading either. The system as popularly used encourages people to find their type and then inhabit it more fully, which is a coherent thing to want and is not development. Steiner's version has the safeguard built into the definition: you are told your temperament in order to be less governed by it.
The temperaments are covered in the four temperaments in Waldorf education, with individual treatments including the melancholic and the phlegmatic.
The Honest Criticism
The descriptions can be cruel. Riso and Hudson's type portraits, particularly in their earlier Personality Types, are unflattering in ways that have shaped how the wider community stereotypes each number. Some of that is the Levels doing their job, since the average and unhealthy descriptions are supposed to sting. Some of it is a writer's relish, and readers have objected.
The system cannot fail. With nine types, two possible wings, three instinctual subtypes, arrows in two directions and nine levels, the model can accommodate essentially any behaviour after the fact. A framework that explains everything is not being tested by anything, and enthusiasts frequently treat successful post-hoc explanation as confirmation.
It is long. The book is thorough to the point of repetition, and a reader who has identified their type will find several hundred pages describing eight types they are not.
Who Should Read It
Read it for the Levels, which are not adequately covered anywhere shorter and are the reason this book outlasted its competitors.
Read it if you already know your type from somewhere else and have stopped finding the system useful. That flatness usually means you have been working with a static description, and the vertical axis is what restores its bite.
Do not start here. A shorter introduction will get you to a working hypothesis about your type faster, and this book is better as the second one.
Our position: the best book in a crowded field, carrying a system whose categories are less solid than its users assume. Take the Levels, which do real work and survive the validity problem. Hold the nine types as a useful lens rather than as nine kinds of person. And notice, when you catch yourself explaining your behaviour by your number, that you have started using the thing backwards.
For a shorter introduction see The Essential Enneagram by David Daniels, and for the individual types our complete guide to the nine types. Readers interested in the transformational use of the system should see The Enneagram of Liberation, and those working on what the type is defending against, shadow work.
Read it for the Levels. That is where the book earns its reputation.
Affiliate disclosure: Thalira earns a small commission on purchases made through the link above, at no additional cost to you. We recommend books we have read and think are worth your time, and we say plainly when we think parts of them are weak.
Frequently Asked Questions
What makes The Wisdom of the Enneagram different from other Enneagram books?
The Levels of Development. Riso and Hudson add a vertical axis to the nine horizontal types, dividing each into nine levels running from healthy through average to unhealthy. That single addition changes what a type description can do, because it means knowing someone's number tells you far less than knowing where in their range they are currently operating.
What are the Levels of Development?
Nine gradations within each type, grouped in three bands. The healthy levels describe the type's capacities at their least defended, the average levels describe ordinary functioning where the type's strategy has hardened into habit, and the unhealthy levels describe the same strategy under enough pressure to become destructive. The same person moves through these across a life and often across a week.
Is the Enneagram scientifically validated?
Partially, and the honest answer is uncomfortable for enthusiasts. Research on the Riso-Hudson Enneagram Type Indicator has found adequate internal consistency, meaning the questions measuring each type hang together. Construct validity is another matter: factor analysis has not supported the claim that the items measure nine distinct types. Support for the system's heuristic value is much stronger than support for the types being real natural categories.
What is the difference between heuristic value and construct validity?
Heuristic value means a framework helps people notice and think about something they would otherwise miss. Construct validity means the categories it proposes correspond to real divisions in the world. A system can have the first without the second, and the Enneagram appears to. That is not a dismissal, since a great many useful frameworks work this way, but it does change what you can claim for it.
Where does the Enneagram come from?
The nine-pointed figure enters modern use through G.I. Gurdjieff in the early twentieth century, who taught it as a cosmological diagram rather than as a personality system. The application to nine personality types is considerably later, developed by Oscar Ichazo and Claudio Naranjo from the 1950s onward. Claims of ancient Sufi or desert-father origins for the personality typology are not documented.
Who were Riso and Hudson?
Don Richard Riso, a former Jesuit who encountered the system in the 1970s and spent decades developing it, and Russ Hudson, his long-time collaborator and one of the field's most respected teachers. Together they founded the Enneagram Institute. Riso died in 2012; Hudson continues to teach and their joint work remains the standard reference.
Is this a good first Enneagram book?
It is thorough and it is long, and a complete beginner may find it heavy going. The type descriptions are detailed to the point of exhausting, which is a strength for a returning reader and an obstacle for a first encounter. Read a short overview to find your likely type, then come here for the Levels, which is where this book earns its place.
What is the danger of Enneagram typing?
Using the type as an identity rather than as a description of a habit. The system is at its most useful when it names a defensive strategy you can see operating and choose against. It becomes harmful when it supplies an explanation for behaviour that removes the need to change it, and every teacher in the field warns about this while the popular use ignores the warning.
How does the Enneagram compare with Steiner's temperaments?
Steiner's fourfold temperaments, choleric, sanguine, melancholic and phlegmatic, were taught explicitly as one-sidedness to be balanced rather than as identity to be claimed. A teacher learned a child's temperament in order to supply what it lacked. That framing is a genuine safeguard the Enneagram lacks, since nothing in the type system itself prevents a person from treating their number as a permanent fact about them.
Can you change your Enneagram type?
Riso and Hudson hold that the type does not change and your position within it does, which is what the Levels describe. Whether the fixed type is a real finding or an artefact of the model is exactly what the validity research leaves open. Practically it matters little: the useful work happens at the level of noticing and loosening a habit, and that is available whatever the type turns out to be.
What are the main criticisms of Riso and Hudson?
That some of their type descriptions, particularly in the earlier Personality Types, are unflattering to the point of caricature and have shaped how types are stereotyped in the wider community. The system is also elaborate, with wings, arrows, instinctual subtypes and levels producing hundreds of combinations, which makes it unfalsifiable in practice since any behaviour can be accommodated.
What should I read alongside it?
David Daniels for a shorter and more careful introduction. Gurdjieff or Ouspensky if you want the figure in its original cosmological use rather than as typology. For a Western developmental system that treats type as something to be worked against, Steiner on the four temperaments.
Ask which level, not which number
You probably already know your type and it has probably stopped telling you anything. Read all nine of your own levels tonight and mark the one that describes this month. That is the question the system was built to answer, and almost nobody asks it.
Sources & References
- Riso, D. R., and Hudson, R. (1999). The Wisdom of the Enneagram. Bantam.
- Riso, D. R., and Hudson, R. (1996). Personality Types: Using the Enneagram for Self-Discovery. Houghton Mifflin.
- Newgent, R. A., et al. The Riso-Hudson Enneagram Type Indicator: estimates of reliability and validity. Measurement and Evaluation in Counseling and Development.
- Naranjo, C. Character and Neurosis: An Integrative View. Gateways.
- Ouspensky, P. D. (1949). In Search of the Miraculous. Harcourt.
- Steiner, R. The Four Temperaments (GA 57). Rudolf Steiner Press.
- Sloww. Wisdom of the Enneagram by Riso and Hudson: deep book summary. sloww.co.
- The Enneagram Institute. Materials on the Levels of Development. enneagraminstitute.com.