From publisher blurb:
Two new subclasses that bring new meaning to the term "class war," a joke that I can't remember anyone else ever using but which I surely can't be the first one to think of, like, come on, that's such an obvious bit.
The Oath of Commulism is an oath sworn not to the gods, but to the people, vowing to fight inequality and exploitation in every corner of the globe! Sworn enemy of the Oath of Commulism, the Bourgeoise Necromancer seeks infinite productivity in pursuit of ever-greater wealth created on the backs of exploited undead workers! But also D&D takes place in the middle ages when, according to Karl Marx, these guys were on the same side.
The document also contains a brief sketch of a steampunk-y setting full of capitalist factories and stagnant aristocracies being slowly usurped by the capitalist class while worker resentment brews underneath, in case you want to make a mini-campaign out of the bit.