ReactiveCocoa/ReactiveCocoa — pull request #778 by codecaffeine (2013-09-01 13:11:03+00:00)
Title: Adding a link to Escape from Callback Hell

I thought this article explained the dangers of callback misuse and how FRP addresses these issue. Developers are starting to see how callbacks can [make code unreadable](http://callbackhell.com). Cocoa developers especially are starting to [run into these issue](https://twitter.com/marcoarment/statuses/365683181069942784) with APIs that use blocks.