Full Idea
The lesson of Hegel's Phenomenology was that the structure of reason was social, and was therefore a historical achievement.
Gist of Idea
The structure of reason is a social and historical achievement
Source
report of Georg W.F.Hegel (Phenomenology of Spirit [1807]) by Terry Pinkard - German Philosophy 1760-1860 10
Book Reference
Pinkard,Terry: 'German Philosophy 1760-1860' [CUP 2002], p.249
A Reaction
This must be one of the most influential ideas to have filtered into the modern world. It is a predecessor of Marxist sociology. The idea that stands against it is Frege's platonist view of logic, making it necessary, despite being historical.