Neil J. Wollman, a psychology professor at Manchester University in Indiana now spearheads the pledge.
On Manchester's campus, the pledge is by now well established. According to Wollman, faculty and administrators support it and have made it a formal part of the commencement exercises.
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Manchester College surveyed graduates for the first time this year, trying to see how durable the pledge has been.
Though only 10 percent of graduates responded, the college said it nevertheless received heartening stories about the pledge's efficacy.
Wollman gave the example of a woman who, spurred on by the pledge she had taken, convinced the company she was working for to refuse a contract to produce weapons.