That's just empirically false, unless you're using "motivation" in some convoluted and incorrect way. Humans are innately motivated to help each other[1], and though that motivation was evolutionarily selected for its positive effects on gene survival, it is now a fundamental human desire that I find noble and beautiful.
I didn't claim otherwise. we are adaptation executers, not gene survival maximizers. this is why it is so important to keep in mind how changes in our environment can have unintended consequences. witness the dual rise of food processed heavily with sugar and degenerative diseases such as diabetes.
[1] See http://www.cbc.ca/health/story/2006/03/02/altruism060302.htm... or http://www.justfuckinggoogleit.com