If you believe the mathematicians, it looks like religion will be almost completely dead soon in nine major Western countries: Australia, Austria, Canada, the Czech Republic, Finland, Ireland, the Netherlands, New Zealand and Switzerland. According to Daniel Abrams, et al,
We present a new treatment of the competition for adherents between religious and irreligious segments of modern secular societies ... Data suggest a particular case of our general growth law, leading to clear predictions about possible future trends in society.
Basically they treat human society as a big interconnected system with predictable properties. You can't predict any one person's behavior, but by the time you're dealing with millions of people, the laws of large numbers and statistics make it possible to make accurate forecasts of seemingly non-mathematical traits like religion and love.
And guess what? Religion is going out of business in a bunch of countries. The trends are clear.
This matches what we know from a number of other sources. They're describing the same phenomena predicted by the Second-Generation Effect, the spread of science and atheism memes, the problem of Mushy Christians, and the effects of wealth and good health. But they're doing it in their abstract mathematician's language that ignores the causes and only measures the results.