An essay by Dennis Overbye makes an important point: if you want a source for good values, look to science.
Science is not a monument of received Truth but something that people do to look for truth.
That endeavor, which has transformed the world in the last few centuries, does indeed teach values. Those values, among others, are honesty, doubt, respect for evidence, openness, accountability and tolerance and indeed hunger for opposing points of view. These are the unabashedly pragmatic working principles that guide the buzzing, testing, poking, probing, argumentative, gossiping, gadgety, joking, dreaming and tendentious cloud of activity — the writer and biologist Lewis Thomas once likened it to an anthill — that is slowly and thoroughly penetrating every nook and cranny of the world.
Nobody appeared in a cloud of smoke and taught scientists these virtues. This behavior simply evolved because it worked.
I’d broaden it a bit and use that fine phrase Jerry Coyne used, “secular reason”, instead of the narrower term of “science”, but this is exactly right. And the antithesis of that virtue is faith and dogma, which teaches deceit and self-delusion, certainty, credulity, mystery, fear and guilt, and intolerance.