Why we should only consider systems of governance that relate to human psychology.

 Imagine a society of sentient, tool-using beings who are closely related to ants and other formic species. Just like humans, they argue about which system of governance and economics is best for their species. However, as they are quite like ants on our world, they respond much better to communalist systems of economy. Their similarity to ants ripples through their psychology and culture and must be taken into account when designing a governance system for them. Thus, in this biological system, communism would work better than capitalism (using human terms to describe these systems of governance.) Because each ant is locked into their caste system and is biologically driven to perform their tasks, they do not need to be paid for their work. They don't want to be paid for their work. They probably don't even know what money is, even as a species. Thus, we can produce, theoretically, a situation where the much maligned system of governance known as communism works. 

This leads to a proposition: any system of governance is not inherently bad. It's just that some systems of governance do not work well with the individual and collective spirit of homo sapiens. We're creatures with a certain set of values, biological drives, and levels of skill distribution. Humans are like dragons: we love to collect things, even if those things do not give us immediate benefit. The more things, the better. We also love to innovate and crack open the mysteries of the universe--and then use that knowledge to create technology. These two species traits are not necessarily requirements for tool use and sentience. Every aspect we consider fundamental to the function of human culture and psyche is not directly related to tool use and linguistic sentience. 

Therefore, there is no system of government that is inherently wrong as a concept. There are only systems of government that are poorly adapted to societies comprised of homo sapiens. From this we can draw a conclusion about how to properly argue for your ideals about human government: namely, that every system has its place, just not with our species. The only thing communists are wrong about is how homo sapiens will react to that system of governance. Their ideology is not inherently flawed on a technical sense. Instead, it is flawed in a psychological and cultural sense. Systems of government must match the peculiarities of the species they derive from. As a corollary, any designer of governmental systems must hold a deep and expansive knowledge of the psychology of the species they are designing for.