Wall of Separation

Where did the term "separation of church and state" come from?

Why, the US Constitution of course.

WRONG!!

It was a line in a letter by Thomas Jefferson in 1802, immortalised and, arguably, misconstrued by Hugo Black in 1948.

Here is an extremely helpful piece on the subject:

“Origins and Dangers of the ‘Wall of Separation’ Between Church and State” Daniel L. Dreisbach, Professor of Justice, Law and Society, American University.

And go to the following link for a fascinating interview with the author: Dennis Prager Show