This article argues that philanthropic endeavors should be undergirded by a theory of philanthropy. Articulating a theory of philanthropy is a way for a foundation to make explicit what is often only implicit, thereby enabling internal and external actors to pose and resolve significant questions, understand and play important roles more fully and effectively, and improve performance by enhancing alignment across complex systems.

Some 30 elements that can feed into a comprehensive theory of philanthropy represent a customizable tool for exploring the issues foundations face. A foundation can use the tool to gather data and perspectives about specific aspects of its heritage and approach; what is learned in addressing the elements can then be synthesized into a succinct and coherent theory of philanthropy.