Earlier quoted context omitted.
> the most dominant hen, that pecked its way to the top of the pecking order at the expense of other hens. Individual selection doesn't necessarily work to the benefit of the group but wait... our entire economical system is based on this.
It's not just our economy. It's the duality of human nature. We function better as a group yet we are competitive at the same time. As a result in practice a hybrid system of capitalism and communism tends to work the best aka socialism. See Scandinavia.
Just because something works in a tiny and homogenous country, under the shadow of a few hegemonic superpowers, does not mean that same thing will work in a super power like the US, which is larger, more heterogenous, and already contributes expenses to world society that benefit Scandinavia.
Take the military for example. In any real world war, Scandanavia would depend on the help of NATO; and yet their contributions to NATO are significantly smaller than those of the larger countries.
Would the Scandinavian system work if any of the Scandinavian countries had a population as large and heterogenous as the US? Or if Scandinavia did not save costs by relying on the power projection of larger allied countries?