The definition of capitalism is free markets. You cannot have property unless you can defend it.

You cannot have property if a government or any person or group can take it.

I agree an ideal government should protect property rights/free markets and the best ones do and have more than others.

All governments have arbitrarily confiscated their citizens property (not freedom/a free market/capitalism). We've never lived under a free market/capitalist society as Booth mentions above.

The closest governments to it, the ones that protect property most, the most capitalist/free market governments have produced the most prosperity and progress for humanity.

See Austrian economics: Mises, Hayek, Hoppe, Rothbard, Friedman is his late years, Booth, Ammous