From an op-ed in the Washington Post by Gregory Paul and Phil Zuckerman…
A growing body of social science research reveals that atheists, and non-religious people in general, are far from the unsavory beings many assume them to be. On basic questions of morality and human decency — issues such as governmental use of torture, the death penalty, punitive hitting of children, racism, sexism, homophobia, anti-Semitism, environmental degradation or human rights — the irreligious tend to be more ethical than their religious peers, particularly compared with those who describe themselves as very religious.
Consider that at the societal level, murder rates are far lower in secularized nations such as Japan or Sweden than they are in the much more religious United States, which also has a much greater portion of its population in prison. Even within this country, those states with the highest levels of church attendance, such as Louisiana and Mississippi, have significantly higher murder rates than far less religious states such as Vermont and Oregon.
As individuals, atheists tend to score high on measures of intelligence, especially verbal ability and scientific literacy. They tend to raise their children to solve problems rationally, to make up their own minds when it comes to existential questions and to obey the golden rule. They are more likely to practice safe sex than the strongly religious are, and are less likely to be nationalistic or ethnocentric. They value freedom of thought.