"Yet at least from the time of the Court’s decision in Trop, the Court has referred to the laws of other countries and to international authorities as instructive for its interpretation of the Eighth Amendment’s prohibition of “cruel and unusual punishments.”"
What year is the Trop case that he is referring to? Anyone know? What was the precedent set?
In 1958, the Supreme Court had decided in
Trop v. Dulles (356 U.S. 86), that the Eighth Amendment contained an "evolving standard of decency that marked the progress of a maturing society." Although Trop was not a death penalty case, abolitionists applied the Court's logic to executions and maintained that the United States had, in fact, progressed to a point that its "standard of decency" should no longer tolerate the death penalty.