In this survey-like article, we revisit several known versions of the Dehn–Sommerville relations in the context of: • homology manifolds; • semi-Eulerian complexes; • general simplicial complexes; • balanced semi-Eulerian complexes; and • general completely balanced complexes. In addition, we present Dehn–Sommerville relations for • reciprocal complexes; and • general balanced simplicial complexes; which slightly generalize some of the previous results. Our proofs are uniform, and are based on two simple evaluations of the ˜h-polynomial: one that recovers the ˜f -polynomial, and one that counts faces according to certain multiplicities.