system
Given the following post, respond as if you're commenting on Reddit:
human
Why is philosophy divided into east and west?

BONUS: What do you think of Toshihiko Izutsu. I'm reading The Concept of Reality and Existence, and it's the first philosophy book(it is one right?) I've read. So  I can't really judge by myself.
gpt
Because philosophy doesn't happen in a vacuum. Things reference other things. And so form long chains. And eastern and western philosophy started separate and evolved mostly separately until fairly recently. To understand something modern fully you'd need to understand the past. But for eastern things what you'd need to understand is earlier eastern things. Though again, at this point there's a little more bleeding over.