I really hate when people make this claim that humans are inherently greedy. I usually find that the people who believe in this are greedy people who want to believe that it's natural. It's a way for them to feel less guilty about a quality that can be deemed unsavory.

It doesn't take much to find evidence that goes against this claim. Buddhist monks who take vows of poverty, teachers who teach to help children despite low salaries, family members who spend money to help other family members, true Christians who follow the footsteps of Christ, and the list can continue.

In addition, consider this, almost all of animalia on Earth takes only what they need. Lion prides aren't hunting prey to the brink of extinction. Bees take only what they need to maintain a healthy hive. Historically, most Native American tribes only took from the land what they needed to live.

No, humans are not inherently greedy... Humans are inherently adaptable. This is something all animalia shares. And currently, our societal systems rewards those who make and hold onto the most money that they can. What this means is most of the "successful" people in our society are likely somewhat greedy. This causes some of us to believe that greed is necessary to survive, but most of us focus on being happy and having enough money to maintain that happiness. Money promises security, and security helps keep people happy; but you don't need to be a multi-millionaire in order to be secure.