“Deeply embedded in conservative and liberal politics are different models of the family. Conservatism, as we shall see, is based on a Strict Father model, while liberalism is centered around a Nurturant Parent model. These two models of the family give rise to different moral systems and different discourse forms, that is, different choices of words and different modes of reasoning."
-- Moral Politics: How Liberals and Conservatives Think, 1996
From the The New York Times today: