First published in 2012, Startup Communities became a blueprint for what it takes to build a supportive entrepreneurial community. Now regarded as a classic, the "Boulder Thesis" created and popularized by Feld within the book generated enormous media attention nearly a decade ago. At that time, Boulder was an emerging startup laboratory-a hub of innovation building new tech businesses. It quickly accelerated into a world class ecosystem for entrepreneurs. Boulder's entrepreneurial density, combined with the geographic concentration of entrepreneurial activity around the Boulder downtown core, made it a hotbed of startup activity. Feld was and is still there, as a keen observer and one of its leaders. As he notes simply in the new edition, humans are wired to start things. In a sense, that short Feld-ism accurately describes the startup revolution still taking hold throughout the world. Boulder is proof that innovation can happen anywhere, in any city. Thanks in part to the book, what happens in Boulder ...