The usual voices are arguing against any “excessive” American reaction to Putin’s invasion of Ukraine. After all, Crimea only became part of Ukraine in 1954. True. And many people there are Russian-speaking and not loyal to Kiev. Also true. And given the geography, we have no military options and neither does the Ukrainian government. Right again. And nothing we can do through sanctions will matter as much to Putin as gaining the Crimea and destabilizing the new, pro-European government in Kiev. Correct. So why should we do anything? Why throw the Russians out of the G-8, and seek trade and...