Founders of Human Systems Dynamics

Glenda Eoyang & Royce Holladay

Glenda Eoyang is the founder of Human Systems Dynamics. Along with Royce Holladay, she established the HSD Institute that certified over 900 HSD Professional Associates and worked all across the globe sharing the work of HSD to help people take the next wise steps as they deal with wicked issues of all sorts. Using Simple Rules, Inquiry, Pattern Logic and Adaptive Action, HSDP Associates are prepared to deal with complex challenges at work, in life for today and the future.

From 1986 to 2003, Glenda established a theory and practice based on complexity theory. Her own leadership led her to write, writing led to teaching, teaching led to consulting, and a doctoral program led to research. In 2003, she founded the Human Systems Dynamics Institute to build a foundation for continuing inquiry and practice.

Since then, the Human Systems Dynamics field, the Institute, and the network of HSD Associates have emerged as powerful forces for change:

  • Interdisciplinary community of scholars and practitioners who develop and test HSD theory and practice, and continue to push the boundaries of thought and action

  • More than 900 certified HSD Professionals supporting their colleagues and clients to influence human systems dynamics

  • Clients around the world use Adaptive Action and Pattern Logic to leverage uncertainty in their own environments and respond to intractable issues for individuals, teams, organizations, and communities.

Hope for the Future

A Note from Glenda

The Global HSD Community is setting conditions to thrive in the uncertainty and turbulence of an unknown future.

Finding YOUR Next Stepping Stone!

A Message from Royce

I believe HSD will inform each of us in our work to build a world of peace and freedom that works for us all.

HSD Field in Expansion

Since the creation of the HSD field by Dr. Glenda Eoyang, more than 14000 practitioners worldwide continue to develop and expand the body of knowledge of Human Systems Dynamics.

In 2025, upon the retirement of the founders of the HSD Institute, HSD Global was created, to nurture the HSD community and carry on the HSD field of study.

HSD Global consists of HSD Services, providing access to the HSD Body of Knowledge to the practitioners worldwide, and HSD Community, as a worldwide platform for developing and expanding the HSD field through both, theory and practice.

“While we cannot predict the future for ourselves or our community, we do know one thing for sure: We will use simple Models & Methods to see, understand, and influence emerging patterns in complex human systems.”

— Glenda H. Eoyang