From The State of Opinion almost immediately after its ratification it became clear that the Treaty of Versailles ending World War I was at least partly unworkable-and in this 1922 work famed economist John Maynard Keynes dissected the problems he saw as the Treaty of Versailles was being put into practice. In what he called a sequel to his 1919 book The Economic Consequences of the Peace Keynes discusses: The debate over German reparations The legality of occupying Germany east of the Rhine The division of reparations among the allies How to best handle inter-ally debt etc.

"But this book is strictly what it represents itself to be a Sequel; I might almost have said an Appendix. I have nothing very new to say on the fundamental issues. Some of the Remedies which I proposed two years ago are now everybodyʼs commonplaces and I have nothing startling to add to them. My object is a strictly limited one namely to provide facts and materials for an intelligent review of the Reparation Problem as it now is."
Keynes