How was this junk food taxation made?

The history of junk food tax happens to be very long. It came up by a physiologist A. J. Carlson, in 1942, where he suggested an extra price for each pound of overweight. This concept was reintroduced in the late seventies by Milton Merryweather and P. Franklin Alexander, and became known to citizens to by Kelly D. Brownell, director of the Rudd Center for Food Policy and Obesity at Yale, in the 1980s.

Since then, there were debates about what we should do with junk food, and also obesity. In 2003 The World Health Organization proposed that nations consider taxing junk foods to encourage people to make healthier food choices.


I found this in Wikipedia:http://en.wikipedia.org/wiki/Fat_tax

Why I couldn't get the history of junk food tax from another site is because this was written in a book, which happens to be published only in the U.S.