I think we underestimate the amount of self-deception that goes on with these deceptions. As evil as some people can be, I think more often we are just unwilling passengers on someone else's delusion.
Waking up every day thinking that things aren't going to work out is hell. At some point you have to do something about it, or you can't keep going on. Hope doesn't care if it's objective or not, and evolution preserves it if it actually works slightly more than never.
