That depends. Some groups have no beliefs---animals, of course. Then, in human beings, it depends upon what group---those who strive to change human behavior, those who defy the controlling group, but themselves constitute a group. Take homosexuality, for an example, which group defines normality? Take cigarette smoking---which group defines normality?
That is why eventually I define normal by the Bible and as you probably guessed I am not a big fan of social anthropology (though I apologize for being a bit of a jerk to you in my first post). But even on a sherely scientiffic basis many of the biggest claims by social anthropologists have been suspect at best.
To equate smoking cigarettes with homosexuality shows me the depth of your intellect.
I don’t smoke, but posts like yours make smoking seem attractive, if only for the “GET STUFFED” quotient.
In a leftist society,
those who can get the most people behind them to put them in power “define normality”.