According to the University of Cambridge, historically, the "most notable spread of atheism was achieved through the success of the 1917 Russian Revolution, which brought the Marxist-Leninists to power."
The atheist Dr. Gordon Stein declared:
|“||Atheism has long ceased to be a rare and oft-ignored philosophical outlook...It has transformed itself into an active political programme with clear objectives which, though they vary from state to state, unequivocally include the elimination of state religion, religious education, and the enshrinement of scientism.|
According an article about American atheism:
According to the 2014 General Social Survey (GSS), the number of atheists and agnostics in the United States has remained relatively stable in the past 23 years. In 1991, 2% of Americans identified as atheist, and 4% identified as agnostic. In 2014, 3% of Americans identified as atheists, and 5% identified as agnostics.
In June 2016, American Interest reported:
“ First of all, religious belief is still very powerful and widespread, and there is nothing inevitable about its decline. In fact, the proportion of people who say they believe in God actually ticked modestly upward, from 86 percent to 89 percent, since Gallup last asked the question in 2014
The Pew Research Center reported in 2013:
“ The number of people who identify themselves as atheists in the United States has been rising, modestly but steadily, in recent years. Our aggregated data from 2012 show that 2.4% of American adults say they are atheists when asked about their religious identity, up from 1.6% in 2007." ”
If you look at the above figures of the percentage of atheists in the United States, American, atheism seemed to have gained during the first five years of the Obama presidency, lost some steam due the Elevatorgate controversy and then lost its gains during the Obama presidency. I say seemed as the American atheist population is largely ignored in the United States and not much research is done on it. The relative stability of the Americans subscribing to an atheist worldview seems to be fairly typical as the GSS survey data over the years indicates.
So what is my prediction of what is going to happen during the Trump administration? Atheists will be more politically active due to backlash but that activity will somewhat diffused between left wing politics having to do with atheism matters and non-atheism matters (abortion, etc.). On the other hand, the overall net effect of the Trump presidency will be negative on the atheist movement. I say this because Betsy Devos, who Trump appointed to be his Secretary of Eeducation, will probably speed up the progress the school choice movement is making, American atheism is very dependent on atheistic indoctrination in the public schools (see: Atheist indoctrination ). In addition, Trump has made a big dent in political correctness which is a practice which seeks to stifle political/religious speech.
The irony of course is that Donald Trump is a nominal Presbyterian and merely an ally of the Religious Right.