In terms of thought processes, it was very probably a trailer of sorts, an indicator of the popular economics books and ideas that were to come in the following years; after it was concocted by the good folk at the economist.
Imagine my surprise when this well made video on youtube, one that explains the concept in such a manner that you need to know little economics and much less of math to understand it, had only 23 views.
So here's my good deed for the day. Click, Watch, Enjoy!
Spread the word around.