Just as any non-material concept, such as democracy, love, courage, and etc, so capitalism is a model, an abstraction of reality, which is context dependent.
So my contribution to the argument is to bring to attention that just as social-democracy can be de-facto a dictatorship, or 'love' can be a prison, or dictatorship can bring religious freedom and the end of slavery (e.g. early Persian empire) and contrast it with early America colonization governments, similarly capitalism as a concept can be approached.
Fundamentally, it is the mixture of government (power) with private enterprise (wealth) that historically is known to generate the greatest human corruption. Just like there people recognized that religion and state should be separated to avoid corruption of both, it should be followed by a divorce of private enterprise and state. [if one should summarize it in one sentence]. It has nothing to do with capitalism, socialism, nationalism, communism... the principle lies elsewhere.