Full Idea
Every philosophy originates as a manifestation of its time; its origin presupposes its historical time.
Gist of Idea
All philosophies presuppose their historical moment, and arise from it
Source
Ludwig Feuerbach (Towards a Critique of Hegel's Philosophy [1839], p.59)
Book Reference
Feuerbach,Ludwig: 'The Fiery Brook: Selected Writings', ed/tr. Hanfi,Zawar [Anchor 1972], p.59
A Reaction
There seems to be widespread agreement among continental philosophers about this idea, whereas analytic philosophers largely ignore, and treat Plato as if he were a current professor in Chicago.