The problem with religion, because it's been sheltered from criticism, is that it allows people to believe en masse what only idiots or lunatics could believe in isolation.

The great religions are also, and tragically, sources of ceaseless and unnecessary suffering. They are impediments to the grasp of reality needed to solve most social problems in the real world. Their exquisitely human flaw is tribalism. The instinctual force of tribalism in the genesis of religiosity is far stronger than the yearning for spirituality. People deeply need membership in a group, whether religious or secular. From a lifetime of emotional experience, they know that happiness, and indeed survival itself, require that they bond with others who share some amount of genetic kinship, language, moral beliefs, geographical location, social purpose, and dress code — preferably all of these but at least two or three for most purposes. It is tribalism, not the moral tenets and humanitarian thought of pure religion, that makes good people do bad things.

And yet people ask what's the harm of religion - and we cite all these different problems with religion: the global gag-rules and things like that , the oppression of different people - but there's a bigger harm with religion, and it's the reason why I'm outspoken about it, and that's because the average feel-good Johnny-in-the-pew person who is decent and kind and loving and good to their family and generally a good person to be around has polluted their mind to the point where they are unable to take credit for their accomplishments and responsibility for their actions. They are unable to interact on an interpersonal level with the people around them, to build a community in this cooperative society where that is absolutely essential. They have got this mentality that they are worthless without God.

One of the most pernicious effects of religion is that it tends to divorce morality from the reality of human and animal suffering. Religion allows people to imagine that their concerns are moral when they are not — that is, when they have nothing to do with suffering or its alleviation. Indeed, religion allows people to imagine that their concerns are moral when they are highly immoral — that is, when pressing these concerns inflicts unnecessary and appalling suffering on innocent human beings.

The problem with religion is that it blends this truth so thoroughly with the venom of unreason.

One of the enduring pathologies of human culture is the tendency to raise children to fear and demonize other human beings on the basis of religious faith. Consequently, faith inspires violence in at least two ways. First, people often kill other human beings because they believe that the creator of the universe wants them to do it. Islamist terrorism is a recent example of this sort of behavior. Second, far greater numbers of people fall into conflict with one another because they define their moral community on the basis of the religious affiliation: Muslims side with other Muslims, Protestants with Protestants, Catholics with Catholics. These conflicts are not always explicitly religious. But the bigotry and hatred that divide one community from another are often the products of their religious identities.

Religions have done far more damage over the centuries than good. Religion may help individuals to bear hard times and trouble and loss, but institutionalized religion of all stripes quickly becomes dangerous. Established religion always seems to breed a them vs us mentality that has lead to crusades, pogroms, ethnic cleansing, the Inquisition, genocide, civil war, and legal discrimination.

ONE OF THE most pernicious effects of religion is that it tends to divorce morality from the reality of human and animal suffering.

One of the things that is wrong with religion is that it teaches us to be satisfied with answers which are not really answers at all.

Religion is a species of mental disease. It has always had a pathological reaction on mankind.

The human psyche has two great sicknesses: the urge to carry vendetta across generations, and the tendency to fasten group labels on people rather than see them as individuals. Abrahamic religion gives strong sanction to both — and mixes explosively with both. Only the willfully blind could fail to implicate the divisive force of religion in most, if not all, of the violent enmities in the world today. Without a doubt it is the prime aggravator of the Middle East. Those of us who have for years politely concealed our contempt for the dangerous collective delusion of religion need to stand up and speak out. Things are different now. “All is changed, changed utterly.” — RICHARD DAWKINS

The human psyche has two great sicknesses: the urge to carry vendetta across generations, and the tendency to fasten group labels on people rather than see them as individuals. Abrahamic religion mixes explosively with (and gives strong sanction to) both. Only the willfully blind could fail to implicate the divisive force of religion in most, if not all, of the violent enmities in the world today. Without a doubt it is the prime aggravator of the Middle East. Those of us who have for years politely concealed our contempt for the dangerous collective delusion of religion need to stand up and speak out. Things are different now. ‘All is changed, changed utterly.

[Religion] is literally a delusion, but one caused by conditioning rather than pathology. There are a number of studies showing a negative correlation of faith as debilitating certain areas of the brain. So religion can lead to, conceal, or even encourage mental disorders without actually being one itself.

The starting point is the recognition that throughout history, religion has been a cause of bloodshed, and it remains so today. Because religion has contributed to the world's problems, it must develop specific and practical ways to help solve those problems.