Cooperation is good. It can lead to success. On the other hand, so can lying, stealing and murder.
Consider our last president. Consider the people who voted for him on the presumption he will get them things that they never earned.
You can argue they cooperated. Of course you can argue that conspiracy is cooperation, too.
My theology concerning human nature is fairly conservative. We are fallen and need a savior.
In the short run, maybe. In the long run you'll be shunned by the rest of the group, which can prove to be quite fatal for critters with the limited natural weaponry and protection enjoyed by humans.