The "collapse" began on this planet offer their symptoms ago DECE 
children.
with the policies of the eighties and were evidence that such behavior "forge ahead", or the arrival of the peak in global energy use per capita 1,979, or the energy crisis (2) of those years (is there a causal link?) That, as a track that took us to the future, showed high energy dependence on the developed world in all its facets.
Between 1979 and 1985, a period of great global economic downturn by increasing oil prices, there were no major "collapses", but if the trend of unemployment, economic crisis, etc. had continued for another decade, the thing would have led to a full-scale collapse.
Prior to that time had he said about the exponential population growth ... "the battle for feed all humanity is lost. In the seventies, the world will undergo famines hundreds of millions of people will die of starvation ... "(Paul Ehrlich, Population Bomb," good "best-seller). Lester Brown, better known by CE, repeated warnings in 1990 in the book The Population Explosion, despite Ehrlich's predictions did not happen.
Based on new evidence of declining fertility, the UN projected that in 2050 the world population will be 9,000 million us (twenty years ago was 11,000 million). After 2050 will remain below 11,500.
Serious studies predict the earth's capacity to support future population, was estimated from a low of 1,000 million on a study of 1,970 to a maximum of 1,022 million according to another study in 1967. Other studies in 1994 said that the range was from less than 5,500 million to a maximum of 44,000 million. But the most recent estimates are between 10,000 and 14,000 million.
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