LRH plucked the overpopulation drama in the Xenu story from overpopulation news stories - QUOTE:
In an article published in New Scientist in December 1967
... Ehrlich asserted that the battle to feed humanity is over and predicted that somewhere between 1970 and 1985 the world will undergo vast famines.
...Ehrlich distilled ...his lectures and articles on the population explosion in The Population Bomb
END QUOTE from http://www.umsl.edu/~biology/icte/WEArecipients/ehrlich.html
My comment: The Internation Herald-Tribune certainly should have covered this troubling doomsday prediction. A touristy place like the Canary Islands gets that newspaper.
Also, the "lectures and articles" phrase above implies that Ehrlich was preaching doom for months before the start of 1968.
... November 20, 1967, a Census Clock hung in ... the Department of Commerce Building, Washington, DC, indicating that the population of the United States was 200 million.END QUOTE from http://www.adelphiasophism.com/goddess/gs25.html
The U.S. population hitting 200 million was BIG news, I remember, inspiring speculation about overpopulation.
(Re-post from Xemnu of the Magic Planet, a thread about how the Xenu story came from comic books and 1960's headlines, at viewtopic.php?f=9&t=5576