I’m working hard on The Startup Community Way this week with my co-author Brad Feld. As we’re polishing up the meaty part of the book—which draws on a wide range of theory, empirics, frameworks, and just some really brilliant thinking on the part of the many impressive shoulders this work stands upon—a few names keep coming up in the references we’ve assembled.

Three of these names I want to talk about today are intellectual giants in the areas of entrepreneurship, geography, and cooperative social systems. Their work collectively intersects in a way that explains a lot about why startup communities exist. If you want to understand startup communities, you should know their work. Two of them I consider friends, so not only do I get to benefit from their insightful work, I also know there’s a kindness and generosity behind their ideas. The third is not someone I knew, and sadly she’s already passed. But, I think a lot of her work and I’ve written about it already.

All three are women.