The problem I want to talk to you about tonight is the problem of belief. What does it mean to believe? We use this word all the time, and I think behind it lurk some really extraordinary taboos and confusions. What I want to argue tonight is that how we talk about belief- how we fail to criticize or criticize the beliefs of others, has more importance to us personally, more consequence to us personally and to civilization than perhaps anything else that is in our power to influence.

The same failure of liberalism is evident in Western Europe, where the dogma of multiculturalism has left a secular Europe very slow to address the looming problem of religious extremism among its immigrants. The people who speak most sensibly about the threat that Islam poses to Europe are actually fascists. To say that this does not bode well for liberalism is an understatement: It does not bode well for the future of civilization.

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.

Nothing guarantees that reasonable people will agree about everything, of course, but the unreasonable are certain to be divided by their dogmas. It is time we recognized that this spirit of mutual inquiry, which is the foundation of all real science, is the very antithesis of religious faith.

Religion provides the only story that is fundamentally consoling in the face of the worst possible experiences - the death of a parent, for instance. In fact, many religions take away the problem entirely, because their adherents ostensibly believe that they're going to be reunited with everyone they love, and death is an illusion.

Norway, Iceland, Australia, Canada, Sweden, Switzerland, Belgium, Japan, the Netherlands, Denmark, and the United Kingdom are among the least religious societies on earth. According to the United Nations' Human Development Report (2005), they are also the healthiest, as indicated by life expectancy, adult literacy, per capita income, educational attainment, gender equality, homicide rate, and infant mortality. . . . Conversely, the fifty nations now ranked lowest in terms of the United Nations' human development index are unwaveringly religious.

About 120 million of us place the big bang 2,500 years after the Babylonians and Sumerians learned to brew beer. If our polls are to be trusted, nearly 230 million Americans believe that a book showing neither unity of style nor internal consistency was authored by an omniscient, omnipotent and omnipresent deity.