Haidt et al decompose moral foundations into several factors to explain how progressives and conservatives view morality differently by virtue of prioritizing different factors; cf. Liberals and Conservatives Rely on Different Sets of Moral Foundations https://fbaum.unc.edu/teaching/articles/JPSP-2009-Moral-Foun...

Moral diversity has always existed. What is new is that polarization between the two camps has been increasing. https://en.wikipedia.org/wiki/Political_polarization_in_the_...