it is easier to explain than most other systems because it is just the natural extension of “I aquired this fur pelt and will defend it” just with a mandatory insurance scheme (government police/laws/military) and more distributed wealth (fractional ownership).

Any system can be easily explained when you just ignore loads of details, emergent behaviors, the goals of the system, and the efficacy of those goals.

Communism is just the natural extension of “we are communal creatures, and community ownership protects us all”.