I was looking for something entirely else on my computer and I found this old data, which I’ve put in a shiny new graph for you. It shows average annual GDP growth 1913-1950 for selected countries as a function of the death rate per thousand of prewar population in World War I.

BEL=Belgium, FRN=France, GMY=Germany, ITA=Italy, JPN=Japan, UKG=Britain, USA=United States, USR=Soviet Union / Russia.