Original sentence: Certain philosophers define atheism as the "absence of belief in deities", rather than as a belief in its own right; this definition has become popular in atheist communities, though its mainstream usage has been limited
Edited sentence: There has been a push in certain philosophical circles to redefine atheism as the "absence of belief in deities", rather than as a belief in its own right; this definition has become popular in atheist communities, though its mainstream usage has been limited