We will never understand liberals and progressives until we recognize that they often see reality as a social construct subject to being challenged and changed. For example, throughout the world, boys and girls have different toy preferences. Typically, boys like to play with cars and trucks, whereas girls prefer dolls. Liberals explain this with the assertion that boys and girls are socialized and encouraged to play with different types of toys by their parents, peers and "society." Growing scientific evidence suggests that toy preferences have a biological origin. Even studies of male and female primates find that they exhibit similar...