Canada and Mexico, living alongside and often in the shadow of the colossus of the twentieth century, have long seen their place in the world as deeply coloured by the reality that they are of the Americas, but not Americans. The two countries have benefited from their proximity to the largest economy on Earth and shelter under its security shield, but have been equally determined to maintain their separate identities and values. As a result, they have honed the skills of idea shapers, coalition brokers and bridge builders. Unlike Americans, they have had to learn how to speak softly, but...