All national space programs are disbanded. The money is put into social programs which expands their budgets by less than two percent. The spending is about as successful as all past social spending. None of it reduces prejudice, makes dishonest people honest nor selfish people generous. Each year that passes by sees more and more people pursuing less and less natural and energy resources.
Greater populations squeeze into the same living space resulting in increasing social tensions.
Famines begin to spread. The burning of the remaining quantities of fossil fuels creates a shortage of plastics, fertilizers and other petroleum-derived substances. Eventually, the resulting global warming raises ocean levels, inundating all coastal cities. Concern for the environment vanishes as everyone does whatever it takes to maintain their accustomed lifestyle. The poor nations become poorer.