Roger Fisher, co-founder of the Program on Negotiation and the Harvard Negotiation Project, died on August 25 at age 90. A true pioneer and leader, he helped launch a new way of thinking about negotiation, and he worked tirelessly to help people deal productively with conflict.

“Through his writing and teaching, Roger Fisher’s seminal contributions literally changed the way millions of people around the world approach negotiation and dispute resolution,” commented Professor Robert H. Mnookin, Chair of the Program on Negotiation at Harvard Law School. “He taught that conflict is not simply a ‘zero-sum’ game in which a fixed pie is divided through haggling or threats. Instead, he showed how by exploring underlying interests and being imaginative, parties could often expand the pie and create value. Here at the Program on Negotiation and the Harvard Negotiation Project, both of which Roger helped launch, we, his colleagues, are committed to carrying on his work of improving the theory and practice of negotiation and dispute resolution.”