“I have increasingly, over the years, felt that religion today does our civilization more harm than good.”
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I am sure it must be true that people opt out of the mainstream society because they feel that there are going to be no rewards for them, if they stay.
It is only partly true that religion does more harm than good in society. The community makes God into the image it wants, vengeful, or milky sweet, or scrupulously just, and so on.
It is very reasonable to worry about the harm done by organized religion, and to prefer looser and more private arrangements.
Religion can make it worse. Are you supposing that if people were encouraged to believe in a transcendent reality, and to be encouraged by grand rituals and music and preaching, to love their neighbors, then they would put jealousy and frustration aside?