Moral absolutism asserts that there are certain universal moral principles by which all peoples’ actions may be judged. It is a form of deontology.
The challenge with moral absolutism, however, is that there will always be strong disagreements about which moral principles are correct and which are incorrect.
For example, most people around the world probably accept the idea that we should treat others as we wish to be treated ourselves. But beyond that, people from different countries likely hold varying views about everything from the morality of abortion and capital punishment to nepotism and bribery.
Moral absolutism contrasts with moral relativism, which denies that there are absolute moral values. It also differs from moral pluralism, which urges tolerance of others’ moral principles without concluding that all views are equally valid.
So, while moral absolutism declares a universal set of moral values, in reality, moral principles vary greatly among nations, cultures, and religions.