@wynn --
But it isn't an assumption that people are all pretty much the same, it's a biological fact. However it is also a biological fact that while we are all pretty much the same there is enough variation between individuals to make most blanket statements false.
However you need to substantiate your second claim about what science says, because I can find nothing in the peer review literature which supports it.
Science works out of the assumption that all people are essentially the same and that the same things make them happy - and considers this assumption non-negotiable.
But it isn't an assumption that people are all pretty much the same, it's a biological fact. However it is also a biological fact that while we are all pretty much the same there is enough variation between individuals to make most blanket statements false.
However you need to substantiate your second claim about what science says, because I can find nothing in the peer review literature which supports it.