In my opinion was the first true capitalist market the stock-exchange of Amsterdam 17th century
https://www.worldsfirststockexchange.com/
It was quite another kettle of fish than the mercantilist France, Britain and Spain and perhaps most of all the French one of Colbert...
https://en.wikipedia.org/wiki/Colbertism
But many state that it only started really in the 19th century with "The Wealth of Nations"...Liberalism and all...
https://www.adamsmith.org/the-wealth-of-nations

And yes in the 20th century Capitalism and Consumerism had its "high days?" (high time?). But doesn't there come at the end no reaction from people's organisations, which condemn the exesses, waste, danger for environment and even for the well-being of the society, the equality of its members and as such a danger for revolutionary tendencies?
https://link.springer.com/chapter/10.1007/978-1-349-16171-3_1
Abstract:
Karl Marx’s analysis of the internal dynamics of capitalist society led him to conclude that this order would be replaced by socialism. Since Marx laid down his pen, academics and political activists alike have hotly debated the accuracy of his predictions and the adequacy of his theory. Though this discussion is by now almost one hundred years old, a few basic lines of argument have been repeatedly advanced by the various antagonists in the debate. Conservatives and liberals have generally argued that various structural developments in capitalist society — such as the growth of the middle class, increasing affluence and the separation of ownership and control — have made Marx’s theory, and socialism, irrelevant. Moderates in the right wing of labour and social democratic movements have contended that Marx erred in underestimating the flexibility of capitalism and the independence of the state in capitalist society. In their view, through the extension of universal suffrage and the expansion of the welfare state, the working class in the West has been politically and economically integrated to play a major role in capitalist society. Revolutionaries, on the other hand, have contended that the changes in capitalist society in the past hundred years have been merely cosmetic. The basic exploitative structure of advanced capitalist society is unaffected by the welfare state or affluence.

That is my first quick approach. What are the honourable members and contributors think about all that?