Most organizations I meet already have a theory of change. It is usually a diagram, built for a funder, living in an appendix. It has boxes and arrows; it uses the word increased several times; and almost no one has looked at it since the grant was signed. That is not a theory of change. That is a picture of one.
The distinction matters more than it sounds. A diagram answers a single question: what will we promise to report? A theory of change answers a harder one: what do we actually believe about how this change happens, and how would we know if we were wrong? The first is a compliance artifact. The second is a discipline.
A theory of change is not a deliverable you finish; it is a habit of being honest, together, about how you think the world works.
I have spent fifteen years in community mental health and Indigenous health and social services, much of it on work that did not lend itself to tidy arrows. When the diagram and the discipline get confused, the cost is real: teams measure activity instead of mechanism, funders mistake motion for progress, and the people the work is meant to serve become data points in someone else's logic model. The fix is not a better template. It is a few changes in how the conversation is held.
Three things I have learned
- Start with the mechanism, not the activities. Activities are easy to list; they are the things you can put on a workplan. Mechanisms are the reasons those activities would change anything, and they are where the real thinking lives. "We will run workshops" is an activity. "Peer facilitators build trust that professionals cannot, and trust is what lets people ask for help earlier" is a mechanism. Name the mechanism and the activities organize themselves.
- Say the riskiest assumption out loud. Every theory of change rests on assumptions, and the most dangerous one is usually the assumption no one in the room wants to name; that the funding will continue, that the community actually wants what we are offering, that the people doing the work will still be here in two years. Surfacing it is not pessimism. It is the difference between a plan that can adapt and one that quietly breaks.
- Treat it as a living instrument. A theory of change earns its keep when reality disagrees with it. If your results never surprise you, you are not learning; you are only confirming. Build in moments to revisit it, and give people permission to say "this part isn't true anymore." The document should change because the work taught you something.
A note on community-led work
In Indigenous health and social services, a theory of change is also a question of who holds the pen. It is easy to write an elegant model in a boardroom and call the resulting consultation "community-led." But if the mechanism of change is trust, self-determination, and lived experience, then the act of authoring the theory cannot be outsourced to the consultant. My job, when I do it well, is to make the thinking rigorous and to get out of the way of whose thinking it is. The best theories of change I have been part of were ones I helped structure but did not own.
So when someone asks me to "build them a theory of change," I usually slow the question down. We can certainly produce the diagram; funders need it and it has its place. But the value was never in the boxes. It is in the honest, sometimes uncomfortable conversation the boxes are supposed to represent; and that conversation is the work.