Krugman, PR. 1996. Pop internationalism. Mit Press.
Written in the mid 90s, this slight text responds to a mountain of literature that paints globalization out to be an area of zero-sum competition between states who look more like companies than nations. Krugman presents a standard liberal account for the lack of substantial growth in real wages since the 70s (slower growth in production) and trade theories of comparative advantage to explain how international trade is an arena of overall gains, and not gains that can best be analogized with military battles, etc.