This is a further modification of Jay Forrester's WORLD2 model. The death rate is reduced in 1970 to better account for the recent advances in medicine.


  1. Cellier, F.E. (1991), Continuous System Modeling, Springer-Verlag, New York, ISBN: 0-387-97502-0, 755p.
  2. Forrester, J.W. (1971), World Dynamics, Pegasus Communications, 160p.

Simulate the model across 100 years, and plot the simulated and the measured world populations together on a single graph against the calendar years:

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