From a speech delivered by a well known Rabbi:
.....An absolutely fascinating story, and it begins with Charles Darwin.
Darwin hit a problem he could not solve. I understand from Darwin that all life evolves by natural selection, which means, by the way of competition for scarce resources: food, shelter and the like.
If so, you would expect that all societies would value the most competitive, even the most ruthless individuals. But Darwin noticed that it isn't so. In fact, in every society of which he knew, it was the most altruistic individuals who were the most valued and admired, not the most competitive. Or, if I can put it in the language of Richard Dawkins: a bundle of selfish genes get together and produce selfless people. That was Darwin's paradox, and it lay unsolved until the late 1970s.
It was then that three very different disciplines converged: sociobiology, a branch of mathematics called games theory, and high-speed computer simulation. Together they produced something called the iterated prisoner's dilemma.
To cut a long story short, what they discovered was that though natural selection works through the genes of individuals, individuals -- certainly in the higher life-forms -- survive only because they are members of groups. And groups survive only on the basis of reciprocity and trust, on what I have called covenant, or the logic of co-operation. One human versus one lion, the lion wins. Ten humans versus one lion, the humans are in with a chance.
It turns out that the very things that make Homo sapiens different – the use of language, the size of the brain, even the moral sense itself -- have to do with the ability to form and sustain groups: the larger the brain, the larger the group.
Neo-Darwinians call this reciprocal altruism. Sociologists call it trust. Economists call it social capital. And it is one great intellectual discoveries of our time. Individuals need groups. Groups need co-operation. And co-operation needs covenant, bonds of reciprocity and trust.
Traditionally, that was the work of religion. After all, the word 'religion' itself comes from a Latin root meaning 'to bind'. And whether we take a conservative thinker like Edmund Burke, or a radical like Thomas Paine, or a social scientist like Emil Durkheim, or an outside observer like Alexis de Tocqueville, they all saw this, and explained it, each in their own way. And now it has been scientifically demonstrated. If there is only competition and not co-operation, if there is only the state and the market and no covenantal relationships, society will not survive.
What then happens to a society when religion wanes and there is nothing covenantal to take its place? Relationships break down. Marriage grows weak. Families become fragile. Communities atrophy. And the result is that people feel vulnerable and alone. If they turn those feelings outward, the result is often anger turning to violence. If they turn them inward, the result is depression, stress related syndromes, eating disorders, drug and alcohol abuse. Either way, there is spiritual poverty in the midst of material affluence.
It doesn't happen all at once, but slowly, gradually and inexorably. Societies without covenants and the institutions needed to inspire and sustain them, disintegrate. Initially, the result is a loss of graciousness in our shared and collective lives. Ultimately, it is a loss of freedom itself.