Full Idea
The period from 1900 to about 1960 could be described as the golden age of 'pure' logic, and 1950 to 1985 the golden age of 'applied' logic (e.g. applied to everyday reasoning, and to theories of language).
Gist of Idea
Golden ages: 1900-1960 for pure logic, and 1950-1985 for applied logic
Source
Keith Devlin (Goodbye Descartes [1997], Ch. 4)
Book Reference
Devlin,Keith: 'Goodbye Descartes: the end of logic' [Wiley 1997], p.85
A Reaction
Why do we always find that we have just missed the Golden Age? However this supports the uneasy feeling that the golden age for all advances in human knowledge is just coming to an end. Biology, including the brain, is the last frontier.