Leonardo Boff is professor emeritus of ethics, philosophy of religion and ecology at Rio de Janeiro State University.
Great crises demand great decisions. There are decisions that involve life or death for some societies, institutions or people. The present situation is like that of a sick person, to whom the physician says: Either you control your high cholesterol and blood pressure or you will have to face the consequences. You decide.
Humanity as a whole has a fever and is ill; humanity must decide: either continue its delusional cycle of production and consumption, always ensuring the growth of the national and world GNP, a cycle very hostile to life, or promptly confront the reaction of the Earth-system, that is already giving clear signs of global stress. There is no nuclear cataclysm, which is not impossible but improbable, and would mean the end of the human species. But we do fear, as many scientists predict, a sudden weather change, so abrupt and drastic that it would rapidly decimate many species and put our civilization at grave risk.