What did keyne's believe would get an economy out of a slump?

John Maynard Keynes believed that government intervention through fiscal policy, particularly increased public spending, could help lift an economy out of a slump. He argued that during economic downturns, consumer demand often falls, leading to unemployment and reduced production. By injecting money into the economy, such as through public works projects or tax cuts, Keynes believed that governments could stimulate demand, create jobs, and ultimately foster economic recovery.