Edmund Burke, one of history's greatest conservatives, warned that abstractions are the enemy of responsible government. "I never govern myself, no rational man ever did govern himself, by abstractions and universals," Burke wrote. "A statesman differs from a professor in a university; the latter has only the general view of society; the former, the statesman, has a number of circumstances to combine with those general ideas." Alas for all of us and for American conservatism in particular, the new Republican majority that took control of the House on Wednesday is embarked on an experiment in government by abstractions. Many in...