Ph.D. degrees in sociology from the University of Washington. He taught in Beirut, Lebanon and Cairo, Egypt, before settling at the University of Alberta in Canada in 1959, where he served as chair of the sociology department from 1970 until 1975 and continued to teach until his retirement in 1983. As a sociologist he did studies of Jordan and the Doukhobors in British Columbia, Egyptian village political awareness, Jordanian social change, and Asian-Americans. He was an active member of Canadian Yearly Meeting of the Religious Society of Friends (Quakers). After retirement he was active on behalf of human rights. Hirabayashi died on January 2, 2012, at age 93, in Edmonton, Alberta. He had been diagnosed with Alzheimer's disease 11 years earlier. Conviction overturned Soon after retiring, Hirabayashi received a call that would prove consequential. Peter Irons, a political science professor from the University of California, San Diego, had uncovered documents that clearly showed evidence of government misconduct in 1942—evidence that the government knew there was no military reason for the exclusion order but withheld that information from the United States Supreme Court. With this new information, Hirabayashi's case was reheard by the federal courts, and in 1987 the Court of Appeals for the Ninth Circuit granted a writ of coram nobis which overturned his criminal conviction (Hirabayashi v. United States (1987)). "It was quite a strong victory—so strong that the other side did not appeal," says Hirabayashi. "It was a vindication of all the effort people had put in for the rights of citizens during crisis periods." "There was a time when I felt that the Constitution failed me," he explains. "But with the reversal in the courts and in public statements from the government, I feel that our country has proven that the Constitution is worth upholding. The U.S. government admitted it made a mistake. A country that can do that is a strong country. I have more faith and allegiance to the Constitution than I ever had before." "I would also say that if you believe in something, if you think the Constitution is a good one, and if you think the Constitution protects you, you better make sure that the Constitution is actively operating... and uh, in other words "constant vigilance". Otherwise, it's a scrap of paper. We had the Constitution to protect us in 1942. It didn't because the will of the people weren't behind it."