The new issue of Philanthropy Magazine features a cover story on Frank Hanna, vice chairman of the Acton Institute board of directors, and winner of the 2007 William E. Simon Prize for Philanthropic Leadership. The story is titled “Call of the Philanthropist,” a play on Acton’s Call of the Entrepreneur documentary, which features Hanna prominently.

The lengthy profile by Christopher Levenick offers insights into Hanna’s philanthropic activities and his philosophy of giving. Rev. Robert Sirico is quoted extensively, as are executives of other nonprofits that Hanna supports. For those who are interested in how philanthropy can be thoughtfully applied — and effective — the article is well worth reading.

Here’s Hanna on “indispensable causes:”

According to Hanna, donors should direct their funds only to causes they deem truly essential. “I believe,” he writes, “that the charities to which we give significant help should themselves be indispensable. In other words, their success should bring to mankind physical, intellectual, moral, or spiritual benefits of the most important kind, benefits without which mankind (or particular individuals) would be fundamentally diminished.”

Once philanthropists have identified the indispensable causes, they should restrict their donations to charities for which their support is truly indispensable. A small contribution to a massive organization will have marginal influence, at best. A series of marginal contributions is hardly better. Funds are always best spent where they will be put to the most effective use. If the organization can succeed without this donation, the money would be better spent on an organization that absolutely needs the funds to attain its objectives.

The Principle of Indispensability is designed to help maximize the leverage of charitable contributions. “Archimedes is credited with discovering how to use a lever to get seemingly disproportionate results,” says Hanna. “But Archimedes didn’t just stick his lever anywhere. He had to find the point of maximal leverage.” So too with philanthropy: Charitable donations achieve seemingly disproportionate results when they are directed to the point of maximal leverage.