From the article and the main point, as far as I'm concerned:

But that doesn’t mean a lack of religious influence — on the contrary. Committed minorities have had a tremendous influence on cultures and even on politics. Just look at all the faith-inspired social-reform movements animated by people of faith. But Martin Luther King Jr. did not get the Civil Rights Act passed because he had the most Bible verses on his side but because he entered into the public square with compelling arguments, vision, and policy that ultimately won the day. Those faith-inspired movements are disciplined by democracy, meaning they don’t expect to win just because they are “Christian.” They have to win the debates about what is best for the common good by convincing their fellow citizens.

Amen.