Best quote from older blog, I got tired of hunting through the old posts to find it worded this way so I'm reposting it here

When your liberal friends say that capitalism demands that the individual be selfish, offer them Frederich Hayek's observation on profit:
"Profit is the signal which tells us what we must do in order to serve people we do not know. By pursuing profit, we are as altruistic as we can possibly be, because we extend our concern to people who are beyond our range of personal conception."