I would implore all readers of my blog to go and read this wonderful guide written by Daniel Loxton. It is called ‘Why is there a Skeptical Movement?‘
The ongoing work of the Skeptics Society and Skeptic magazine is part of an ancient and noble public service tradition. Today, we present two chapter-length explorations of that tradition, digging into the roots, founding principles, and purpose of scientiﬁc skepticism.
There have been a number of wonderful posts on a similar subject from Steven Novella over at the Neurologica blog (Bigfoot Skeptics, New Atheists, Politics and Religion and the follow on post) and Barbara Drescher at the ICBS Everywhere blog (On Skepticism: Its Definitions and Scope).
This is a subject that comes up time and time again, but as I’ve said elsewhere on this blog when I wrote about the simplification of skeptical communities by some involved in organised skepticism, reflection is a good thing.