The history of the Agile methodology

Back in 2001, 17 software developers met at a resort in Utah, U.S., to discuss lightweight development methods, which they called Agile. Since then, it has become the most popular methodology in the history of software development.

Note

Note: The Wikipedia page for Agile, https://en.wikipedia.org/wiki/Agile_software_development, is a great resource for understanding its history.

Nowadays, a bigger gathering of organizational anarchists would be hard to find, and so what emerged from this meeting was a symbolic manifesto for Agile software development, which was signed by all 17 participants. Together, they published the Manifesto for Agile Software Development, which you can read fully on their site: http://agilemanifesto.org/principles.html. However, for ease, you can also read the 12 principles here:

1. The highest priority is to satisfy the customer's requirements through early and continuous delivery of valuable software.
2. Welcome changing requirements...