Published in 1972, The Limits to Growth was the first study to demonstrate that the consequences of human population growth (related rates of industrialization, pollution, food production and exploitation of resources) could have devastating effects on the earth’s ecosystem and threaten human survival. Forty years later, a review of the biography of the study’s authors seeks to answer the question as to whether the limits have been exceeded or whether there is still time for a final call. Written and directed by Enrico Cerasuolo. Produced by Massimo Arvat.