Sam Alito doesn’t seem to have been much of a joiner; on his 1985 job application he listed only two organizations of which he had been a member, the Federalist Society, in which he was active, and the Concerned Alumni of Princeton, in which he was not. Rich Lowry makes some excellent points about these two organizations, and the rise of conservatism:
A conservative with intellectual or public-policy interests in the late 1970s surveyed a bleak environment. The universities, the law schools, the federal government and the courts were held by the left.
But then, the values Alito had grown up with struck back with Ronald Reagan