And yet there is a current of philosophic thought that calls this "human nature" and I would argue with that because what makes us truly human is our bonding in society which is counter to these selfish interests.

Indeed and if you do something which is selfish and greedy (or worse) there appears to be some comfort (for some) in maintaining that this is just "human nature". That if you didn't do it first then someone else would only come along and do it. Now it may be true that this is "human nature" but it is only one part of it.

In every world trouble spot where the greedy and the selfish are waging war or generally doing their best to destroy our planet for short-term gain - there are the selfless or at least the practically helpful, who are displaying another part of "human nature" and trying to heal and patch up the victims, often at great personal risk.