[scrumIsNotAgile]

To answer the fundamental question "What is Agile" is simple:

It's a bullshit panacea that pretends to address all concerns around the uncertainty inherent in the production and delivery of complex software.

Every methodology claims to be agile, most of which are not, and claim to provide managers and MBAs the ability to prognosticate accurately - none of which actually do.

If you eliminated entire layers of management and non-technical people from software development, you wouldn't have anyone talking about "Agile" or "Agile Methodologies" at all.