capital accumulation ---> tenancy of the rate of profit to fall ----> lowering wages or lowering profit ----> market crash after market crash ----> rise of unions ----> wages rise ---> crashes and threat of crashes become much worse ---> capitalists and gov work together to reduce wages ----> gov runs out of options, resorts to imperialism to combat lowering rate of profit ---> runs out of countries ---> more market crashes ---> ww2 ---> market boom ---> invasion and oppression of third world countries to keep wages artificially low to keep the system alive

For the book, it also goes over things like how monopolies will always form under capitalism.