Christianity has survived on a mixture of rosy promises and fear and that still applies to some other religions, predominately Islam. However, subservience and respect for those who were once deemed more knowledgeable is no longer automatically accepted in the west and therefore people are now far more likely to ask questions. In receiving no satisfactory answers to those questions, those who are able to shake off the yoke of societal and cultural indoctrination realise that they are quite capable of surviving without superstition and therefore cease to believe. That said, many highly educated people cling to religion, so education is not a guarantee of rational thinking – and in my experience, educated or not, many, although not church-goers, continue to harbour a wishy-washy concept of a God that loves them and regards them as somehow special so I’m always wary of ‘statistics’ in this area.