The society isn't capitalist. The economy is capitalist.
Unlike monarchy/communism/fuedalism etc where power and resource allocation are by necessity mostly centralised, capitalism can (and wants to) be divorced from power, and only do resource allocation. Constant realigning it with power (e.g. regulatory capture) is what corrupts it.
The sort of (limited) power capitalism creates is by creating value in some way: labour, capital, contacts, resources. It's not derived from strength, unlike the other methods.
Of course a government, that is fundamentally derived from strength, and must be, can still fight wars. It can do it much better in fact because its economy was organised by the most efficient manner anyone's ever discovered, and so there's a surplus to tax and an efficient economy to flow requirements through.
Capitalism doesn't have desires outside of those of the people who participate in it that hold the most power. The desire of those people is more power. Not resource allocation as an ends, but as a means to more profit.
It has been shown time and time again that the majority of the powerful players in a Capitalist economy inherited their wealth or opportunities.
Capitalism can only function in an economy if a government allows it by setting up the necessary structures and allowing private property ownership.
Society can certainly be Capitalist by extension of the economy being Capitalist due to policies and strucutes set up by goverments.
Unlike monarchy/communism/fuedalism etc where power and resource allocation are by necessity mostly centralised, capitalism can (and wants to) be divorced from power, and only do resource allocation. Constant realigning it with power (e.g. regulatory capture) is what corrupts it.
The sort of (limited) power capitalism creates is by creating value in some way: labour, capital, contacts, resources. It's not derived from strength, unlike the other methods.
Of course a government, that is fundamentally derived from strength, and must be, can still fight wars. It can do it much better in fact because its economy was organised by the most efficient manner anyone's ever discovered, and so there's a surplus to tax and an efficient economy to flow requirements through.