The American labor movement was fostered and inspired by religion.
The anti-abortion movement, well let's not go there. You might not agree that the defense of the unborn represents an advance in our understanding of human rights.
To attribute our current understanding of human rights to the advent of secularism is a logical fallacy, an example, if you will, of post hoc, ergo propter hoc reasoning. It is especially unpersuasive in light of the avatars of secularism in the recent past, i.e., Jacobin France, Stalinist Soviet Union, Maoist China, Pol Pot's Cambodia, and whoever is now in charge of North Korea.