Smaller international organizations do sanctions better, Bryan Early has found. Indeed, sanctions from the United Nations are commonly useless.
David Brin criticizes the possibly reckless turn in recent SETI research. He also speculates on what the great silence may say about human societies.
Robin Hanson does a cost-benefit analysis on yelling into the cosmos.
Evolutionary psychology explains how we have the societies we do. It will also probably work with extraterrestrials, says Jerome H. Barkow.