Originalism, of course, purports to be an attempt to ascertain how the framers of the Constitution understood the meaning of its language. But were the framers originalists themselves? Did they think that Americans of 2018 should be bound by their values?
Jefferson was in Paris during the Constitutional Convention, so, technically, his views shouldn’t count, but in practice, they do. There is no doubt that he wasn’t an originalist, because he stated openly that no generation had the legal and moral right to bind its successors.
As to the rest, they were just struggling to create a political system that would survive the problems of the day. The issues we face today don’t bear any resemblance to the kinds of issues that existed in 1787. In addition, most of the legal questions that give rise to originalism revolve around the Bill of Rights and the Fourteenth Amendment, which were not discussed during the Constitutional Convention. So, on balance, it is clear to me that the Founding Fathers were not, in fact, originalists themselves.