Here's a quote I found from Aristotle:
"When they till the ground together the question of ownership will give a world of trouble. If they do not share equally in enjoyments and toils, those who labor much and get little will necessarily complain of those who labor little and receive or consumer much . . .
Property should be . . . as a general rule, private; for when everyone has a distinct interest, men will not complain of one another and they will make progress, because everyone will be attending to his own business . . ."
Of course some things should be socialist in nature, such as infrastructure, but capitalism with the proper regulation is still the best economic system yet devised.