How much longer do you think religion has in western society?
Unfortunately religion is here to stay.
If find it reassuring that younger generations, through access to information and science, are realizing that religion is nothing but a bunch of antiquated superstitions and flat-out lies invented by some people to assert control over other people.
Even if it had its use in the past because it fulfilled our basic human need to understand the unknown ( where do we come from? what happens when we die? how was the world created? etc ) and it provided well established moral guidelines (i.e the ten commandments), we made such huge strides in our understanding of the world through science than religion is basically useless in that respect nowadays.
And yes intelligent design is bullshit.
In conclusion I will say this: since our society gave power to a secular form of politics as opposed to having religious leaders our western world has reached an age of maturity.
Just take a look at the Middle East to see how bad it gets when religion and power are intertwined.