The alien entity with an IQ approaching 400 explains during a channeling session why Capitalism is the predominant system in Human societies.
"The secret of Capitalism's success relies on superior maximization of utility. Humans evolved from territorial apes where superior reproductive opportunity comes to those who conquer more territory than others. To the victors, the spoils, to the vanquished, becoming the spoils of the victors. Thus, the possibility of individual aggrandizement is the most powerful motivator of Human action and thus a system that rewards one with the biggest possibility of self-aggradizement works best. Also, resources are managed more effectively by one or a few people rather than many. When trying to coordinate action of large numbers of people, information is utilized less effectively due to problems of communication. Unlike us, the ones you call Greys, who are telepathic, Humans utilize language to convey information, and language is too imprecise and too little descriptive to convey information effectively. The larger the number of people involved in a task, the less likely the task is to be done effectively due to the many problems of communication that arrise. Thus capitalism results in superior maximization of utility by better motivating people to achieve and to use resources effectively, and by superior micro-management of resources by dividing the economy into millions of managers instead of a few. In a communist country, large bureacracies manage the economy poorly because they have no motivation for self-aggrandizement besides the rare promotion in the Party and because a few bureacrats cannot possibly organize the millions of variables involved in managing an economy effectively."
Regarding capitalism, with its arguments that the whole benefits from the avarice and greed of the few. Proponents point to the United States or other western civilizations as proof of the theory. Where in truth there are the wealthy, as there always are in every civilization, nevertheless poverty still reigns for the masses. Is your United States any different, in truth? How many citizens are starving on the streets, in increasing numbers? How many tiny school children sit with hollow eyes because their bellies are cramping in an insistent demand for the breakfast they never seem to get? How many families try to make moldy, bug ridden quarters cheerful, with not much more than a plucked dandelion or two. Children playing in the mud because this is their only toy. This is Capitalism's outcome despite it's superior effectiveness at generating material good. In point of fact, these statistics would be a thousand times worse if Capitalism were allowed to run full course. It is held in check by your laws."
SUCKMYMUSCLE