Smith (1990):  This case dealt with a criminal statute that was (yet again!) general and neutral on its face but had adverse impact on a religious group.  Many scholars think that this case overruled the approach taken in Scherbert and Yoder.  In this case, the issue was whether Oregon could criminalize the possession of the drug peyote, and refuse to give an exemption to Native-Americans whose use of the drug is a central part of their religious rites.  Was this a violation of the Free Exercise Clause?