This is an excellent bit of work: Adam Lee gives the big-picture perspective on the shifts within the atheist movement.
The animating idea behind Atheism+ is that atheism isn’t a stopping point, but a beginning. We’re atheists not because we want to gather and engage in collective back-slapping, not because we want to chortle at the foolishness of benighted believers, but because we care about creating a world that’s more just, more peaceful, more enlightened, and we see organized religion as standing in the way of this goal. We consider politically engaged atheism an effective way to demolish this obstacle, to refute the beliefs that have so often throughout human history been used to excuse cruelty, inequality, ignorance, oppression and violence. (Full disclaimer: I identify as a member of A+ and as a proponent of social justice.)
What’s more, we refuse to believe that skepticism and critical thinking can be usefully applied only to claims about the supernatural. We believe that it’s equally valuable to apply them to real-world power structures that perpetuate inequality and injustice. Thus, the goals of Atheism Plus: We are atheists and skeptics, plus we defend women’s rights and reproductive choice, plus we fight against sexism and racism, plus we oppose homophobia and transphobia, plus we call for equality of opportunity and economic fairness, and so on.
I agree so completely (although I don’t yet identify as a member, but do concur on social justice). We cannot use the slogan “good without god” unless we actively promote good social behaviors.