A brief political history of religious exemptions

"...In recent years — especially with the debate about Hobby Lobby — I’ve seen lots of people assert that religious exemption regimes are a conservative invention. That’s just not the case, and I thought I’d briefly explain why..."
http://www.washingtonpost.com/news/volokh-conspiracy/wp/2015/01/21/a-brief-political-history-of-religious-exemptions/