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STAGES International | Unfolding the Living Map of Life

The Power

of perspective

Learn your exact developmental level and unlock your full potential.

STAGES charts human development through the latest, researched levels known to us, what those levels mean and look like, and how to actualize them in your own life.

STAGES International allows us to determine our stage of perspective development and develop it over time.


We offer live and online events and certification programs throughout the year.  These programs are currently open for registration.

Work With Us

Programs & Events

We offer live online courses, events and trainings, and self-paced classes, all designed to bring this theory to life by grounding it in daily experience.


STAGES offers two kinds of certifications to better enable you to bring this groundbreaking work into your own life.


Determine the stage of perspective development for you, your clients, or your executive team.

Big Problems Need Big Perspectives

 We are living in an increasingly polarized and divided world. We face challenges with our environment, our governments, our employees and colleagues, and in how we relate to our partners and families, our communities, and even in understanding our own most deeply-held beliefs.

We can’t fix a problem if we don’t understand what’s causing it, no matter how passionate or caring we may be.

This is as true in business leadership as it is in one-on-one therapy or coaching, education, or in addressing existential environmental issues.

STAGES allows us to view our world through a lens that honors complexity — so our solutions can address the roots of the problem and therefore take hold more deeply and effectively.

Terri O’Fallon, PhD

STAGES evolved through Terri’s decades of research and experience and her integration of this data with other evolutionary models, such as Ken Wilber, Jean Gebser, Susanne Cook-Greuter, and Jane Loevinger. STAGES includes the most comprehensive understanding we have of the complete human: psychological, biological, cultural, and spiritual.

Kim Barta, MA

Kim’s specialty is psychological shadow and its resolution. He developed several new therapeutic practices that lead to deep and rapid healing, proving themselves effective with a wide range of issues. He brings nuance and direct application into the STAGES model, allowing it to be integrated into the world of psychotherapy and coaching.

Get advanced notice about live and online events, discounts on courses, and access to free articles and audio.

We don’t share your information with any other organizations and we only send information you’ll find useful.

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We don’t share your information with any other organizations.

I consent to STAGES International collecting my information to send me news, my free talks and Roadmap, and other useful information.

See our privacy policy for how we protect and manage your submitted data.

STAGES is an Applied Theory

STAGES gets its data from the real world and is informed by the real world. STAGES is being used in the following fields, with measurable results:

  • Psychotherapy
  • Coaching
  • Business Leadership
  • Organization Development
  • Education
  • Parenting
  • Counseling and Advising
  • Relationships


“Terri O’Fallon is one of the very most important integrally informed researchers now working. I highly recommend checking her out at your earliest opportunity!”

Ken Wilber
The Integral Vision

“Post-conventional developmental stages are one of the most important yet under researched areas of Integral studies, and we can all be grateful to Terri O’Fallon, who is one of the very few researchers exploring this crucial topic.”

Roger Walsh
University of California Irvine Medical School

Free Resources

Stages Roadmap

Get the big picture view that developmental psychology gives about life, leadership, parenting, and relationship.

Audio Series

Download or stream free audio on the STAGES theory, STAGES and parenting, grief and loss, and the highest levels of human development yet known to us.

Blog and Papers

Access academic papers on STAGES from Terri, Kim, and other academics, blogs on more day-to-day application of the theory, and much more.

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