We might imagine they were (then) a bunch of young thugs getting high and playing music. They do a little something in a garage and it turns out great. But this article shows young, intelligent and creative people who came together to produce something really great. Richards and Jagger bounce ideas off each other and work them over time.
It starts with the idea, then the music, playing with sounds in a recording studio and finally the lyrics inspired by witnessing a protest/riot in Paris.
For those of you who love the Stones and writing; good article.