More on cooperation, and a question

In my Thanksgiving post I mentioned the need for cooperation. It seems to me that just about every constructive thing that the human race has accomplished has been the result of cooperation.

We cooperate with each other in business, making deals with suppliers on materials prices, with clients on prices, with galleries on how pieces will be displayed and on their commissions. It would seem like a given that cooperation is an essential part of business. And yet, and this brings me to my question, cooperation is now seen as a "left wing" idea.

I am puzzled by exactly how this happened. I can understand how any number of ideas became associated with the left wing. But cooperation? Is this not a basic human idea? That we work together to solve problems?

Would compromise, by the same logic, also now be considered a left wing idea? I would love to get some other thoughts on this.

D.D.