Epochs of world history?

https://redfortyeight.com/?s=stages+of+production+theory

Marxism would be a lot more useful and able to really assist the left if it dropped its historical theories which were long connected to claims of science but which seems dated and finally false. The case of ‘stages of production’ theory is too obviously now a kind of theoretical propaganda and it is not convincing.
Capitalism is not a stage of history and the progression of feudalism, capitalism, communism simply doesn’t work. The extent of world history has vastly expanded and the question of economic determination does really explain the world saga that we see now as it stretches back many millennia in eras unknown in the time of Marx in the early nineteenth century.
The result here is a closed system of thought that has long been challenged and which the public even if sympathetic to socialism, could never really accept.