Original sentence: After the war these Keynesians assisted the state in the development of regulatory institutions that limited the excesses and mitigated the failures of the free market and which were intended to sustain free trade through regulation.Although in David Ricardo's time economists regarded the regulatory powers of the state as being more destructive than beneficial, the economic shocks of the later nineteenth century, the early twentieth century and the Great Depression produced a strain of economists led by John Maynard Keynes who criticized laissez-faire capitalism as itself destructive
Edited sentence: Although in David Ricardo's time economists regarded the regulatory powers of the state as being more destructive than beneficial, the economic shocks of the later nineteenth century, the early twentieth century and the Great Depression most famously developed a strain of economists led by John Maynard Keynes who criticized laissez-faire capitalism as itself destructive, and in great need of assistance in the state in the development of regulatory institutions that limited the excesses and mitigated the failures of the free market