Was the Joker a product of escalation? If you recall the conversation between Bruce Wayne and Alfred in the Dark Knight, Alfred notes that some men are evil without motivation. As he put it, "Some men just want to watch the world burn."
He makes the Joker sound like an existence without cause, not an inevitable cause of 'escalation'.
Can anything exist without cause? Can people act without motivation?
Even here Alfred makes reference to escalation - the mob turned to the Joker because of Batman and his tactics.
In the end, the Joker even says he doesn't want to kill Batman, the "what would I do without you" line:)
Good point.
I think we're not arguing the same point here, however. What I am addressing is that latter part - Joker's darkness isn't summoned by Batman's light. It is a darkness that exists as a parallel to Batman's unwavering sense of good.
Of course, this pertains to Joker as he exists in the Nolanverse. I actually like the Flashpoint version of Batman and Joker as well, if you're familiar with that. I won't spoil it, in case you haven't gotten a chance to read it.
I would ask: What light? A child playing in the sandbox, an artist lost in his painting or a girl on the subway enjoying a great song on her mp3, people in love, a walk in nature...that's light. Batman may have "good intentions" and he may care about people but he is very far from the light.
He even says: "Bats frighten me. It’s time my enemies share my dread."
I don't consider him as the incarnation of light in this story.
I do believe, in the context of this story, it was he that attracted Joker to Gotham.