Full Idea
From today's perspective it is in a way clear that Kant was the first philosopher. Pre-Kantian philosophy cannot think in his transcendental aspect.
Gist of Idea
Kant was the first philosopher
Source
Slavoj Zizek (Conversations, with Glyn Daly [2004], §1)
Book Reference
Zizek,Slavoj: 'Conversations with Zizek (with G.Daly)' [Polity 2004], p.26
A Reaction
It is probably equally plausible to say that Kant was the last philosopher. More thought-provoking than true.