adrienne maree browne, in Emergent Strategy, talks about non-linear change as one of the principles of emergence. This is the idea that a small change can lead to huge effects (the metaphorical butterfly wing causing a hurricane). What's interesting is that she doesn't just talk about this in a spatial sense, but in a temporal sense as well. Something that happened in your 20s might have a huge impact when you're 50. There are some experiences that can have an impact over an entire lifetime.
The documentary Crip Camp shows how a single experience in time can have outsized impacts on society. Crip Camp was a camp for persons with disabilities in the 1970s. It was run on very different principles. Having access to the documentary footage is priceless. You can see how much fun the participants had. You can see how much they were empowered to think of themselves differently, as full-dimensional human beings.
This one experience enabled those camp participants to later be prime movers in the campaign to enact the American Disabilities Act, which had an enormous impact on the lives of millions of Americans. The camp had created leaders who manifested their leadership with exponential power.