There is a strong correlation between religious belief and various measures of social dysfunction including homicides, the proportion of people incarcerated, infant mortality, sexually transmitted diseases, teenage births, abortions, corruption, income inequality and more.

While no causal relationship has been established, a United Nations list of the 20 best countries to live in shows the least religious nations generally at the top. Only in the United States, which was ranked as the 13th best country to live in, is religious belief strong relative to other countries. Moreover, virtually all the countries with comparatively little religious belief ranked high on the list of best countries, while the majority of countries with strong religious belief ranked low. While correlation does not equal causation, the evidence should give pause to religion’s defenders. There are good reasons to doubt that religious belief makes people’s lives go better, and good reasons to believe that they make their lives go worse.

Despite all this most people still accept some religious claims. But this fact doesn’t give us much reason to accept religious claims. People believe many weird things that are completely irrational—astrology, fortunetelling, alien abductions, telekinesis and mind reading—and reject claims supported by an overwhelming body of evidence—biological evolution for example. More than three times as many Americans believe in the virgin birth of Jesus than in biological evolution, although few theologians take the former seriously, while no serious biologist rejects the latter!

Scientists don’t take surveys of the public to determine whether relativity or evolutionary theory are true; their truth is assured by the evidence as well as by resulting technologies—global positioning and flu vaccines work. With the wonders of science every day attesting to its truth, why do many prefer superstition and pseudo science? The simplest answer is that people believe what they want to, what they find comforting, not what the evidence supports: In general, people don’t want to know; they want to believe. This best summarizes why people tend to believe.

But we shouldn’t be deceived. Although there are many educated religious believers, including some philosophers and scientists, religious belief declines with educational attainment, particularly with scientific education. Studies also show that religious belief declines among those with higher IQs. Hawking, Dennett and Dawkins are not outliers, and neither is Bill Gates or Warren Buffett.

Or consider this anecdotal evidence. Among the intelligentsia it is common and widespread to find individuals who lost childhood religious beliefs as their education in philosophy and the sciences advanced. By contrast, it is almost unheard of to find disbelievers in youth who came to belief as their education progressed. This asymmetry is significant; advancing education is detrimental to religious belief. This suggest another part of the explanation for religious belief—scientific illiteracy.

the burden of proof is not on the disbeliever to demonstrate there are no gods, but on believers to demonstrate that there are. Believers are not justified in affirming their belief on the basis of another’s inability to conclusively refute them, any more than a believer in invisible elephants can command my assent on the basis of my not being able to “disprove” the existence of the aforementioned elephants. If the believer can’t provide evidence for a god’s existence, then I have no reason to believe in gods.

If someone makes a claim without concern for reasons and evidence, we should conclude that they simply don’t care about what’s true. We shouldn’t conclude that their beliefs are true because they are fervently held.

Another problem is that fideism—basing one’s beliefs exclusively on faith—makes belief arbitrary, leaving no way to distinguish one religious belief from another. Fideism allows no reason to favor your preferred beliefs or superstitions over others.

If I must accept your beliefs without evidence, then you must accept mine, no matter what absurdity I believe in.

But is belief without reason and evidence worthy of rational beings? Doesn’t it perpetuate the cycle of superstition and ignorance that has historically enslaved us? I agree with W.K. Clifford. “It is wrong always, everywhere and for everyone to believe anything upon insufficient evidence.” Why? Because your beliefs affect other people, and your false beliefs may harm them.

Faith without reason doesn’t satisfy most of us, hence our willingness to seek reasons to believe. If those reasons are not convincing, if you conclude that religious beliefs are untrue, then religious answers to life’s questions are worthless. You might comfort yourself by believing that little green dogs in the sky care for you but this is just nonsense, as are any answers attached to such nonsense. Religion may help us in the way that whisky helps a drunk, but we don’t want to go through life drunk. If religious beliefs are just vulgar superstitions, then we are basing our lives on delusions. And who would want to do that?

Why is all this important? Because human beings need their childhood to end; they need to face life with all its bleakness and beauty, its lust and  its love, its war and its peace. They need to make the world better. No one else will.