If we accept that conservatism is a political and social philosophy that promotes retaining traditional social institutions, and that liberalism is a political philosophy or worldview founded on ideas of liberty and equality, then I would propose that conservatism is generally on the wrong side of history, when it comes to social justice issues.
Pope Leo XIII on liberalism (From his encyclical “
Libertas”):
…
But many there are who follow in the footsteps of Lucifer, and adopt as their own his rebellious cry, “I will not serve”; and consequently substitute for true liberty what is sheer and most foolish license. Such, for instance, are the men belonging to that widely spread and powerful organization, who, usurping the name of liberty, style themselves liberals.
…
Hence, these followers of liberalism deny the existence of any divine authority to which obedience is due, and proclaim that every man is the law to himself; from which arises that ethical system which they style independent morality, and which, under the guise of liberty, exonerates man from any obedience to the commands of God, and substitutes a boundless license.
…
Hence, these followers of liberalism deny the existence of any divine authority to which obedience is due, and proclaim that every man is the law to himself; from which arises that ethical system which they style independent morality, and which, under the guise of liberty, exonerates man from any obedience to the commands of God, and substitutes a boundless license. The end of all this it is not difficult to foresee, especially when society is in question. For, when once man is firmly persuaded that he is subject to no one, it follows that the efficient cause of the unity of civil society is not to be sought in any principle external to man, or superior to him, but simply in the free will of individuals; that the authority in the State comes from the people only; and that, just as every man’s individual reason is his only rule of life, so the collective reason of the community should be the supreme guide in the management of all public affairs.
And so on…
Also see Pope Gregory XVI,
Mirari Vos (On Liberalism and Religious Indifferentism)
The trouble is, though, that most people today who style themselves “liberals” are more closely related to a form of fascism or even socialism. They don’t believe in freedom of thought. In fact, most practice a form a rigid orthodoxy (if you don’t believe exactly as they do, you are a hater. If you oppose abortion on demand, you are a misogynist. If you oppose the simulation of marriage by two men or two women, you are a homophobe). And most have very little respect for private property (except for their own, of course).,in direct violation of the teachings of the Church.
See Leo XIII
Quod Apostolici Muneris for a very forceful rejection of Socialism.
Bottom line is that I don’t really accept your premise.