Is "Radical Christianity" the New Legalism?

I thought this article by Ed Stetzer was really interesting.

I hadn't thought through the issue of “radical Christianity” and the danger of legalism before so it was good food for thought. 

The  idea that the desire to “be radical” / change the world /make a difference can be idolatrous came up for me just last week through reading Keller’s “Every Good Endeavour” but nonetheless it's a new thought.   (Is it the product of an affluent 21^st century, narcissistic consumerism…..  100 years ago you just did what your dad did and got on with it – now if you're not “changing the world”, well, it's not worthwhile…..)

http://www.edstetzer.com/2013/05/radical-christianity-a-cause-to-live-or-a-call-to-legalism.html

Anyway – thought you'd be interested.