Ah I see. Well, Salvador Allende was elected, the US was responsible for killing him. The US brought down Jacobo Arbenz, who was elected. The list goes on. You will most likely not see "different social systems" work withing "democracies", because the US and other imperialist nations won't allow it. Also, I don't see capitalist leaders keeping an open mind. Especially in the United States.
Communism didn't exist in Russia. And also, a few questions, in what way was the system selfish? Isn't the capitalist system, where everything is produced in order to gain profit for oneself, and where you take advantage of poor human beings, the most selfish system, ever? What do you mean by organised properly? In what way less extreme?