Gregory Clark cites this fact in his book A Farewell to Alms: <https://archive.org/details/farewelltoalmsbr00clar/page/92/mode/2up?q=London https://archive.org

Gregory Clark cites this fact in his book A Farewell to Alms: <https://archive.org/details/farewelltoalmsbr00clar/page/92/mode/2up?q=London https://archive.org/details/farewelltoalmsbr00clar/page/92/m...> Specifically, that situation prevailed from the 16th through 19th centuries. That's a brief period from a geological standpoint I suppose... <https://www.worldcat.org/title/farewell-to-alms-a-brief-economic-history-of-the-world-the-princeton-economic-history-of-the-western-world/oclc/939234998 https://www.worldcat.org/title/farewell-to-alms-a-brief-econ...>