David Horowitz suggests in a National Review Online column that the fractious conservative movement could find common ground in backing the concept of freedom.

“Progressive,” “socialist,” and “liberal” are interchangeable terms that describe members of a moral crusade. The goal of the crusade is “social justice,” or its equivalent: equality. The quest for this utopia of social and economic equality is what forges their alliances, defines their allegiances, and justifies the means they use to get there. They may differ on particular policies and tactics to advance the cause, but if they are Democrats or supporters of the Democrats, they see the party as the practical vehicle for making the idea a reality.

To transform society, you need the power of the state; it is the only way their future can be achieved. That is why they are willing to follow the marching orders of a party that can control the state, and that is why they want to advance its fortunes. The Democrats’ perennial campaign message — Republicans are conducting a war on minorities, women, working Americans, and the poor — rests on the central idea that unites progressives behind the party: We are for equality, they are against it. …

… Here is the bottom line: If conservatives continue to ignore the fact that their opponents approach politics as a religious war, if they fail to organize their own resistance as a moral cause, they will eventually lose the war and everything that depends on it. …

… Fortunately, the objections of conservatives are not an obstacle to getting behind a unifying idea. The conservative cause already has a moral core; it is just not currently a political theme, the way equality is for Democrats and progressives. But it can be made into one.

Conservatism is by nature a defensive posture. It is about protecting the constitutional system created by the Founders. But the creation of this constitutional arrangement was a revolutionary act. It provided a political framework to maximize individual freedom and allow citizens to exercise their talents and enjoy the best possible lives. What conservatism is about is freedom, and this is its natural unifying idea.