In reading the two books under review, I was reminded of Senator Fulbright's book The Arrogance of Power—or at least of the title. Each of these two works, also dealing with the relationships of the United States to the less developed world, but each making a different point, can be summed up in a similar substantive phrase: Geiger's thesis would be “The Humility of Ignorance”; Kaplan's, “Commitment to Responsibility.”