Humanists believe people are responsible for their own destiny and reject the notion of a supernatural force or God.Rather succinct; says it all really.
If you have to develop a whole ethical framework to prop up the contention, well, that kind of sounds like a religion.
Those concerned deny it, of course:
The society does not consider itself to be a religious organisation and believes ethics have "no necessary connection with religion".And the disconnection of ethics from religion has been such a success over the last century or so.
It's amusing really - one imagined it was the adult incest lobby that was going to make the most headway into the mainstream this decade but the atheists are moving ahead.
Good time in history to make your move, chaps.