Overconsumption guarantees extinction---nuclear war, droughts, starvation, climate disruption, and terrorism.

The collapse of civilization in the next few decades is imminent, and it could be triggered by a variety of factors, Paul Ehrlich told Sputnik.

"It could be caused by a nuclear war, droughts and floods leading to mass starvation, a bursting of the debt bubble, political unrest from refugee flows or increasing economic inequity, trade wars, terrorism or synergizing combinations of these and other factors," the researcher said.

The main reasons behind all these negative predictions are, according to the scientist, overpopulation and overconsumption. He is confident that these two factors will drive our civilization over the edge.

"The basic problem is the wrecking of human life-support systems by growth in aggregate consumption — and that is a product of growth in population size and growth in per capita consumption. Various forms of inequity — gender, racial, religious could contribute by making it less likely that people will provide the cooperation required to give the chance of avoiding a collapse," the analyst argued.

In Ehrlich's view, the situation has significantly worsened since he released a corresponding warning in his book "The Population Bomb" 50 years ago.

"The population has doubled in size, climate disruption is now much more thoroughly understood and is already causing problems, there soon will be more weight of plastics in the oceans than fish; hormone-mimicking synthetic chemicals are now toxifying earth from pole to pole and are the likely cause of plunging sperm counts around the world; almost half of wildlife has been exterminated in the greatest mass extinction episode in the last 66 million years," the analyst said.

According to him, the chances of a global nuclear war wiping out civilization are now also "higher than at any time during the Cold War except for the Cuban missile crisis."

Although, there have been numerous warnings about the way humans are threatening life on earth, governments and the international community have so far failed to reduce this threat, and Ehrlich believes that there are several reasons for this.

Among them are "the lack of education in basic science, especially among economists and politicians, who think economic growth is the cure for everything rather than what it is — the basic disease," the analyst said, adding that a key role is also being played by such negative traits if a human character as "greed, stupidity and arrogance."