The Anti-Federalists Papers are a set of works, written by the Founding Fathers, with the aim of judging the credit that the very recent US Constitution of 1787 had achieved. The first written work from the set dates back from the end of 1787 and the others continued being published along the early 1790s.
The Founding Fathers acted as critics of the centralization and unification processes as they argumented that, in some sense, the Constitution had posed a threat on the rights and freedoms that had been recently acquired from the English colonizers.