“Keynesian economics was, in the context of those times, essentially conservative.”
James Tobin, "A Revolution Remembered", Challenge (1988).
1970s and later
Context: Keynesian economics was, in the context of those times, essentially conservative. The message was that capitalism was not doomed; its major failing, chronic large-scale unemployment, could be remedied fairly easily, by intelligent use of the fiscal and monetary instruments governments already had at their disposal. This message was not welcome news to Marxists committed to the view that the system was no longer structurally capable of prosperity and progress.