John Maynard Keynes, 1st Baron Keynes (CB, FBA), was an English economist particularly known for his influence in the theory and practice of modern macroeconomics.
Keynes married Russian ballerina Lydia Lopokova in 1925.
NB: Not to be confused with his father who also was an economist. See John Neville Keynes.
Always enjoyable to read essays by one of the greats. & interesting to see how early discussions of things like "the fiscal multiplier" worked. Still, some of the earlier essays are excessively wordy, especially as they just attempt to arrive at the estimate of a single number... many do not cite sources.
Keynes's thoughts on Versailles are also very insightful and history definitely bears him out on the treaty being beyond Germany's ability to pay. Much of this is based on detailed work estimating Germany's financial capacity. Still, some is just very subjective takes based on news articles about the motivations and capabilities of different players (e.g. Woodrow Wilson).