In Texas, Thomas Jefferson is set to be removed from the textbook standards explaining how Enlightenment thinkers have influenced revolutions since 1750. Replacing him will be the French theologian John Calvin. After a long and emotionally-charged debate, the Texas Board of Education -- dominated by a group of conservatives -- voted last week to make this and a host of other changes to the state curriculum, a move that has wide-ranging implications for students across the country. How did this happen? A Conservative Clique On The Board The Board of Education consists of 15 elected officeholders.