Pablo Eisenberg, a fierce critic of nonprofits and philanthropy, died at age 90

Pablo Eisenberg, who died last month, urged deep-pocketed donors to give away even more and spend their money where it is most needed. (Idit Knaan, The Chronicle of Philanthropy)

In the rarefied world of private philanthropy, where nonprofits are loath to criticize the moneyed donors whose largesse they depend on, Pablo Eisenberg was an anomaly.

A nonprofit leader, professor and social justice advocate, he was a loud and influential watchdog of the philanthropic sector, which he routinely castigated for promoting inequality and neglecting the most pressing concerns of society.