The question of why you will want to choose Backbone for your project really has two parts. First, there's the question of "Why use a rich application framework at all?," and second, there's the question of "Why choose Backbone over its alternatives?." Let's start with the first question.

To truly appreciate the value of a single-page application (SPA), it's essential to understand what came before. All previous websites can be grouped into three major categories, which I'll call static, server-based, and JavaScript-assisted. Each of these types correlates with a different era in web development history.