Community gardens, time banks, credit unions, etc are small, but they're economic institutions that are resilient, sustainable, ppl-centered— Mai Sutton (@maira) August 17, 2016
Often, we associate impact with bigness, speed: large-scale interventions, disruptive innovations, fast-growing startups, the iPhone, solar energy projects, that kind of thing.
Another way to think about impact is to include the time variable:
impact = (value * scale) * time
A neighborhood park that lasts genenerations, a tree planted out front, a library. Small things that last a long time have high impact.