Original Sin
The original sin, as told by the bible, is when Eve picked an apple from the Tree of Knowledge, and she and Adam ate it. This apple was not purchased from a reputable agent of the Vegetarian Industrial Complex, and thereby was considered a bad thing. It has only recently been uncovered that this story is part of a larger conspiracy.
Since the development of Original Sin, however, many clone sins have been developed as open source alternatives to Original Sin. Some sins improve on the functionality of Original Sin while still offering backward-compatability in the form of service to the Meme Dispersal Ministry of the Vegetarian Industrial Complex.