Anyway Richard, i'm going to talk about one of the most recent research studies because I think you'd find it interesting and it'd help make my point.
Atheism correlates with Conservativsm and Religiousness liberalism on average, so i'd cite this study.
"My Brothers Keeper"
Social Psychological and Personality Science journal
Liberal websites like the Huffington Post excitidly posted about an advance abstract that they though proved atheists were more compassionate and more charitable then the religious, without looking at the data i suppose.
What they did was they used priming along with an old "game theory" money giving experiment.
Priming is when you show something meant to effect the actions of others. For example you might show one group of people a waterfall, then another people taking, to see if the people who see the waterfall have to pee first.
Basically how the compassion expierment works is you bring two subjects into the room and give him $100 and tell him he can split that money between the two of them anyway he wants.
So what they did was... they showed people one of two videos. One, the control, of two men just talking about something unrelated. In the other, it talked about poor children who were starving.
Afterwords, they were given the money and asked to split it.
As it turns out. There was almost no change among the religious. The religious gave an average of $3.90 for every 10 dollars when viewing the control... and $4.10 when viewing the video meant to incite compassion.
Now Atheist, there was a HUGE change. When directly induced with compassion, the atheist gave around $5.60 per 10! However... when it came to the control. The atheist only ended up giving 60 cents for every dollar given.
This either suggests that atheists are MUCH more motivated by direct suffering of others... or are just less consious of it on a day to day basis.