You seem unable to understand soontobe that what you believe is personal to you. You may believe in heaven and hell - others are either undecided or don't believe - conceptually or materially - in the existence of heaven and hell.
This inability of certain sections of people from all religions or belief systems to appreciate that their beliefs are unquestionable and inherently superior, has, I feel, caused and continues to cause many of the problems in the world today.
France is a secular state but I don't think it has done a particularly good job of integrating its population and has far worse race relations that we do. I'm inclined to think, though, that this lack of cohesion may well be more connected to resentments arising from its colonial history - in particular in relation to Algeria - than to secularism.
A review in "Christianity Today" of a book called "Society without God" which looks at the effect of secularism on societies, with particular reference to Swedish society, concluded that:
"Zuckerman proposes what he calls a "socio-religious irony." The world's great religions speak of caring for the sick, the poor, and the orphaned, and of practicing mercy and goodwill toward fellow humans, yet these traits are often more evident in the world's least religious nations."
The reviewer points out that this does not prove causation - that secularism results in a more altruistic and caring society - but she nevertheless recognises that it is something worth considering.
I realise this is straying away from the OP. But, as some posters appear to think that the current privileged position of the C of E provides some sort of ethical/moral framework which would not be there without its presence, I thought I'd just throw another thought into the mix.