… Massachusetts. In addition, he has ongoing fellowships at the Harvard Kennedy School and at Highstead, a non-profit advancing land conservation in New England. Levitt focuses on … In each of these landmark innovations, key factors for success include: the engagement of highly talented social entrepreneurs; the leveraging of some of the most advanced … Massachusetts. In addition, he has ongoing fellowships at the Harvard Kennedy School and at Highstead, a non-profit advancing land conservation in New England. Levitt focuses on …