Interesting view, but in a anarchy you can have socialism as well. I do believe it can work in small groups, like clans. Being a good person is actually more beneficial. For capitalism to succeed, selfishness must be tempered by an equally powerful inclination toward cooperation, empathy and trust β traits that are hard-wired into our nature and reinforced by our moral instincts.
You sound like a right-wing conservative. What has that got to do with Anarchism?