This methodology of doom prediction based on complex, "expert" generated, unverifiable computer models was later taken in full stride by the global warming propagandists. Both had the exact same intent, scare people into believing that the world was on the verge of complete collapse and that the only solution is world government. In reality, the global warming myth is an extension of The Club of Rome's activities
From Mankind at the Turning Point:
"Governments and international organizations are currently too preoccupied with military alliances and bloc politics. But this problem is becoming of secondary importance... Therefore, barring suicide, mankind will face the most awesome test in its history: the necessity of a change in the man-nature relationship and the emergence of a new perception of mankind as a living global system." [emphasis mine] - 146
"Precisely because the symptoms of these global crises might become fully visible only toward the end of the century, the time to act is now; when the symptoms become clear the remedy will no longer be possible, as has been shown repeatedly in this report. Future history will not focus on personality and social classes, as has been characteristic of history in the past, but on the use of resources and survival of the human species. The time to affect that history is now." [emphasis mine] - 146
The quote above cannot be emphasized enough. The fear that has been used to unify our national societies is being moved from the Hitler/Saddam Hussein type personalities and the Communist/Capitalist class struggles to global unity based on resource depletion and the survival of the human species.
Furthermore, in 1991, in a book entitled The First Global Revolution: A Report by the Council of The Club of Rome  and coauthored by one of the founders of The Club of Rome, Alexander King, they admitted choosing global warming and other threats to unify humanity under a world government.
"In searching for a new enemy to unite us [all of humanity], we came up with the idea that pollution, the threat of global warming, water shortages, famine and the like would fit the bill. In their totality and in their interactions, these phenomena constitute a common threat which as the enemy, we fall into the trap about which we have already warned, namely mistaking symptoms for causes. All these dangers are caused by human intervention and it is only through changed attitudes and behaviour that they can be overcome. The real enemy then is humanity itself." [emphasis mine]
 Quotes from Mihajlo Mesarovic and Eduard Pestel, Mankind at the Turning Point: The Second Report to The Club of Rome (1974). ISBN 0-525-03945-7
 Quotes from Alexander King and Bertrand Schneider, The First Global Revolution: A Report by the Council of The Club of Rome (1991). ISBN 0-671-71107-5