Within secular thought, which we can call atheism for simplicity, is a large schism which limits its growth. With numbers as small as they are, this split is more limiting to atheism than differences among Christians are to the faith.
While I’m not sure I can accurately describe the factions in atheism, I’ll start by saying one branch began with Thomas Paine. I would describe this faction as having a positive and idealistic message about reason, and a humanistic focus.
This group would say humans have the ability to gather together and come to reasonable consensus on how the organize themselves and how to treat each other. It is not necessary to seek devine guidence. Implied in this is that the “getting together” would be within an elected government.
The other faction of atheists sometimes would be called liberatarians. They have a strong dislike for most large institutions including both church and government.
The problem is these two threads of thinking will seldom support the same candidate for office. The Paine group will often support liberal democrats while the liberatorians might team up with religious people who also dislike government behind a conservative religious candidate.
Religious folks who post comments on this blog sometimes rightly point out more time is spent bashing the faith than advancing positive aspects of secularism. That’s partly because the two branches both agree on getting religion out of government.
What to do next is not so clear.