SEVERAL POLLS indicate that the term "atheism" has acquired such an extraordinary stigma in the United States that being an atheist is now a perfect impediment to a career in politics (in a way that being black, Muslim or homosexual is not). According to a recent Newsweek poll, only 37% of Americans would vote for an otherwise qualified atheist for president.

Atheists are often imagined to be intolerant, immoral, depressed, blind to the beauty of nature and dogmatically closed to evidence of the supernatural.

Even John Locke, one of the great patriarchs of the Enlightenment, believed that atheism was "not at all to be tolerated" because, he said, "promises, covenants and oaths, which are the bonds of human societies, can have no hold upon an atheist."

That was more than 300 years ago. But in the United States today, little seems to have changed. A remarkable 87% of the population claims "never to doubt" the existence of God; fewer than 10% identify themselves as atheists — and their reputation appears to be deteriorating.

Given that we know that atheists are often among the most intelligent and scientifically literate people in any society, it seems important to deflate the myths that prevent them from playing a larger role in our national discourse.

1) Atheists believe that life is meaningless.

On the contrary, religious people often worry that life is meaningless and imagine that it can only be redeemed by the promise of eternal happiness beyond the grave. Atheists tend to be quite sure that life is precious. Life is imbued with meaning by being really and fully lived. Our relationships with those we love are meaningful now; they need not last forever to be made so. Atheists tend to find this fear of meaninglessness … well … meaningless.

2) Atheism is responsible for the greatest crimes in human history.

People of faith often claim that the crimes of Hitler, Stalin, Mao and Pol Pot were the inevitable product of unbelief. The problem with fascism and communism, however, is not that they are too critical of religion; the problem is that they are too much like religions. Such regimes are dogmatic to the core and generally give rise to personality cults that are indistinguishable from cults of religious hero worship. Auschwitz, the gulag and the killing fields were not examples of what happens when human beings reject religious dogma; they are examples of political, racial and nationalistic dogma run amok. There is no society in human history that ever suffered because its people became too reasonable.

3) Atheism is dogmatic.

Jews, Christians and Muslims claim that their scriptures are so prescient of humanity's needs that they could only have been written under the direction of an omniscient deity. An atheist is simply a person who has considered this claim, read the books and found the claim to be ridiculous. One doesn't have to take anything on faith, or be otherwise dogmatic, to reject unjustified religious beliefs. As the historian Stephen Henry Roberts (1901-71) once said: "I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours."

4) Atheists think everything in the universe arose by chance.

No one knows why the universe came into being. In fact, it is not entirely clear that we can coherently speak about the "beginning" or "creation" of the universe at all, as these ideas invoke the concept of time, and here we are talking about the origin of space-time itself.

The notion that atheists believe that everything was created by chance is also regularly thrown up as a criticism of Darwinian evolution. As Richard Dawkins explains in his marvelous book, "The God Delusion," this represents an utter misunderstanding of evolutionary theory. Although we don't know precisely how the Earth's early chemistry begat biology, we know that the diversity and complexity we see in the living world is not a product of mere chance. Evolution is a combination of chance mutation and natural selection. Darwin arrived at the phrase "natural selection" by analogy to the "artificial selection" performed by breeders of livestock. In both cases, selection exerts a highly non-random effect on the development of any species.

5) Atheism has no connection to science.

Although it is possible to be a scientist and still believe in God — as some scientists seem to manage it — there is no question that an engagement with scientific thinking tends to erode, rather than support, religious faith. Taking the U.S. population as an example: Most polls show that about 90% of the general public believes in a personal God; yet 93% of the members of the National Academy of Sciences do not. This suggests that there are few modes of thinking less congenial to religious faith than science is.

6) Atheists are arrogant.

When scientists don't know something — like why the universe came into being or how the first self-replicating molecules formed — they admit it. Pretending to know things one doesn't know is a profound liability in science. And yet it is the life-blood of faith-based religion. One of the monumental ironies of religious discourse can be found in the frequency with which people of faith praise themselves for their humility, while claiming to know facts about cosmology, chemistry and biology that no scientist knows. When considering questions about the nature of the cosmos and our place within it, atheists tend to draw their opinions from science. This isn't arrogance; it is intellectual honesty.

7) Atheists are closed to spiritual experience.