Antonin Scalia on Foreign law

“If you have that philosophy, obviously foreign law is irrelevant with one exception: Old English law, because phrases like "due process," the "right of confrontation" and things of that sort were all taken from English law. So the reality is I use foreign law more than anybody on the Court. But it's all old English law.”

“I don't know what it means to express confidence that judges will do what they ought to do, after having read the foreign law. My problem is I don't know what they ought to do. What is it that they ought to do? You have to ask yourselves, Why is it that foreign law would be relevant to what an American judge does when he interprets -- interprets, not writes -- I mean, the Founders used a lot of foreign law. If you read the Federalist Papers, it's full of discussions of the Swiss system, German system. It's full of that. It is very useful in devising a constitution. But why is it useful in interpreting one?”