For Stiefel, a slim, scruffy ex-Catholic, his public persona is his wallet and activism. Through the Stiefel Freethought Foundation, the 38-year-old has made an indelible impact on the nation’s fastest-growing “religious” group: the nonbelievers. Most of the highest-profile atheists campaigns –- flashy billboards in high-traffic areas, news-making efforts to get atheists to come out of the closet, and boisterous rallies - are funded by his fortune. Stiefel was born in Albany, New York, in 1974 to Catholic parents. He was raised in a Catholic household, confirmed in the church,d attended Sunday school, went to a Catholic high school. At 18, Stiefel attended Duke University to pursue a degree in psychology. To fill an elective, he took an Old Testament history class at the Duke University Divinity School. It was there, he said, that his final “ebb” away from belief took hold. After graduating from Duke, Stiefel went into the family business: Stiefel Laboratories, a company that develops products to combat skin diseases. For 12 years, Stiefel worked with his family and turned the business into a major player in their specialized market. n 2009, with Stiefel in an executive position, the Stiefel family opted to sell the company to GlaxoSmithKline. The price tag: $2.9 billion, according to media reports at the time. Stiefel put $2 million in to begin his foundation. In his first year, according to tax documents, the nonprofit disbursed $700,000 to groups like the Secular Coalition for America, the American Humanist Association and Americans United for Separation of Church and State.