CHICAGO — For a guy who is only 35 and lives in a walkup apartment, Eboo Patel has already racked up some impressive accomplishments. A Rhodes scholar with a doctorate in the sociology of religion from Oxford University, he has four honorary degrees. His autobiography is required freshman reading on 11 college campuses. He runs a nonprofit organization — the Interfaith Youth Core — with 31 employees and a budget of $4 million. And he was tapped by the White House as a key architect of an initiative announced in April by President Obama. Mr. Patel got there by identifying a sticky problem in American civic life and proposing a concrete solution. The problem? Increased religious diversity is causing increasing religious conflict. And too often, religious extremists are driving events. He figured that if Muslim radicals and extremists of other religions were recruiting young people, then those who believe in religious tolerance should also enlist the youth. Interfaith activism could be a cause on college campuses, he argued, as much “a norm” as the environmental or women’s rights movements, as ambitious as Teach for America. The crucial ingredient was to gather students of different religions together not just to talk, he said, but to work together to feed the hungry, tutor children or build housing. “Interfaith cooperation should be more than five people in a book club,” Mr. Patel said, navigating his compact car to a panel discussion at Elmhurst College just west of downtown Chicago, while answering questions and dictating emails to an aide. “You need a critical mass of interfaith leaders who know how to build relationships across religious divides, and see it as a lifelong endeavor.” Until Mr. Patel came along, the interfaith movement in the United States was largely the province of elders and clergy members hosting dialogues and, yes, book clubs — and drafting documents that had little impact at the grass roots. Meanwhile at the grass roots, interreligious friction was sparking regularly over public school holidays, zoning permits for houses of worship and religious garb in the workplace. At many universities, there is open hostility over the Israeli occupation of Palestinian territories and the failure to find a peaceful solution. Mr. Patel, who is Muslim, is not saying that his plan will solve all those conflicts, just that the focus should be on what he calls “the American project.” Immigrants across the generations brought their faiths, their biases and their beefs and “built a new pattern of relationships” over here, he said, pointing out that English Protestants and Irish Catholics eventually overcame their enmity on these shores. “When I go to a campus where the Muslim Student Association and the Hillel are not talking to each other,” he said (referring to the national Jewish student group) this spring in a lecture at Columbia University, “my question to them is, ‘Who did you feed in Ramallah by not talking to Hillel? Who did you keep safe in the south of Israel by not talking to the M.S.A.?’ ” There are many interfaith groups, but none like Mr. Patel’s, where youthful idealism and spiritual searching have been channeled by pro bono consultants from McKinsey & Company into strategic plans, templates and spreadsheets. The offices take up a whole floor in a handsomely renovated industrial building. On one end is a small prayer room. On the other is a bulletin board where the manager of foundation development tracks grant applications worth millions of dollars. At a staff meeting, which started and ended on time, two senior leaders in Tshirts emblazoned “Better Together” walked everybody through a PowerPoint presentation of the group’s recent expansion. By the end of the school year in June 2010, the Youth Core had trained 18 “interfaith fellows” who each recruited about 40 students on their campuses. By this June, the Youth Core had trained leaders on 97 campuses, who engaged an average of 100 students, for a total of 10,000 participants — more than 10 times over the previous year. The leaders are undergraduates, religious and nonreligious, who attended summer training sessions led by Youth Core staff members, and then returned to their campuses to organize interfaith events and community service projects using the upbeat slogan, “Better Together.” The meeting ended when the vice president for strategy and operations, Gabe Hakim, a former McKinsey analyst who wears a “What Would Jesus Do” bracelet, recited his signature sendoff: “Let’s go make it a norm.” Mr. Patel responded with his signature meeting closer, “Rock on.” Mr. Patel started the Youth Core in 2002 with a Jewish friend, a $35,000 grant from the Ford Foundation and one fulltime paid staff member, April Mendez, an evangelical Christian who still works with the organization as vice president for leadership. Mr. Patel’s parents were Indian immigrants from the Ismaili Shiite sect (led by the imam Aga Khan IV), which is known for its philanthropic work. But Mr. Patel spent his days at the University of Illinois at UrbanaChampaign and afterward running away from his own roots, searching for spiritual identity and purpose. He read Dorothy Day and lived in Catholic Worker houses, volunteered in a homeless shelter run by evangelical Christians in Atlanta, practiced Buddhist meditation and made a pilgrimage to the Dalai Lama in India (which is chronicled in his autobiography, “Acts of Faith,” published in 2007 by Beacon Press). But when he visited his grandmother in Mumbai and saw her taking in battered women, he realized that his own tradition offered the ethic of service and humanitarianism he had been looking for all along. Now, during the work day, Mr. Patel flies from speaking engagements to White House meetings to college campuses. Six university presidents have signed paying contracts to have the Youth Core assess the state of interreligious relations and awareness on campus and devise proposals on how to improve them. The Rev. Michael J. Garanzini, president of Loyola University, a Jesuit university in Chicago, said of Mr. Patel’s group: “They don’t have the knowledge base or experience in theology, but they have provided the data on where our kids are. The world we grew up in was all Irish, Italian and German. Now it’s Vietnamese, and Poles and Jewish kids from Skokie. We are not automatically able to reflect on their reality.” The White House initiative is the biggest breakthrough yet. Mr. Obama sent a letter last month to 2,000 university presidents inviting them to sign up their campuses for the “Interfaith and Community Service Challenge” in the coming school year. So far, about 400 have signed on. Joshua DuBois, executive director of the White House Office of FaithBased and Neighborhood Partnerships, said Mr. Patel, who served on the president’s religion advisory council, and the Youth Core staff were “critical early partners” in developing the new initiative. “You have people who can cast a vision but then not implement the vision,” Mr. DuBois said in an interview. “Then you have people who are great implementers but are not very inspirational. Eboo is a unique leader who can do both.” At night, when Mr. Patel comes home to his apartment, his yearold son, Khalil, is waiting at the glass door. Mr. Patel tries to live the philosophy that exposure to other religions enhances one’s own. He and his wife, Shehnaz Mansuri, a civil rights lawyer and a Sunni Muslim, have hired a South American nanny who sometimes recites the Lord’s Prayer to their two sons. They send their 4yearold, Zayd, to a Roman Catholic preschool. “When Zayd talks about saints,” Mr. Patel said, “I can tell him about imams.