"When people can vouch for people, friction from certain systems can disappear at scale," says the co-founder of Kiva and president of Branch, Premal Shah, on The Web of Us. In conversation with Claire Wathen, Premal takes us behind-the-scenes on how he created the world’s foremost microfinancing platform for underserved markets, shares how he made the leap from PayPal to social enterprise founder, and his favorite advice for living life like a hummingbird.