Imo, Libertarianism>Fascism>Communism
Libertarianism is people controlling government, with an emphasis on free-markets & private property. The founding fathers of the US were Libertarians.
Fascism is our current form of government in the US, with corporations controlling government with paid career politicians.
Communism/Socialism is government taking over corporations. Everytime its been tried it has failed, from Nazi (National Socialist) Germany, to N. Korea & Venezuela.