Certainly in my opinion the demise of Christianity cam about because the Churches didn't move with the times.
During the 60's things became more relaxed in our ways of living, whilst the Churches remained stiff, starchy and stiffed lipped - there was no giving or bending for a little change in some areas.
we all have to move with the times or we get left behind.
What is deemed to be the way of 'Christian' living, doesn't need a person to go to Church, the majority of us live our lives as Christians without even thinking about it.
It's surprising though how many people revert to The Old Rugged Cross for a Hymn at a funeral.
I must add though that I do feel quite disappointed when most people don't even know the words to so many of the old favourite hymns - just another piece of our history dying - or dead!!