Ramsey, F. P. (1928). The Economic Journal, 38(152), 543–559.
Read in full in NOTE-1287, from the published article, public domain in the US, from the Internet Archive’s scan of the issue (sim_economic-journal_1928-12_38_152).
Why this is here
The classic refusal to count the future for less merely because it is later, which longtermism inherits. For QUESTION-299.