By 2025, American democracy could collapse, causing extreme domestic political instability, including widespread civil violence. By 2030, if not sooner, the country could be governed by a right-wing dictatorship.

We mustn’t dismiss these possibilities just because they seem ludicrous or too horrible to imagine. In 2014, the suggestion that Donald Trump would become president would also have struck nearly everyone as absurd. But today we live in a world where the absurd regularly becomes real and the horrible commonplace.

Leading American academics are now actively addressing the prospect of a fatal weakening of U.S. democracy.

This past November, more than 150 professors of politics, government, political economy and international relations appealed to Congress to pass the Freedom to Vote Act, which would protect the integrity of US elections but is now stalled in the Senate. This is a moment of “great peril and risk,” they wrote. “Time is ticking away, and midnight is approaching.”

I’m a scholar of violent conflict. For more than 40 years, I’ve studied and published on the causes of war, social breakdown, revolution, ethnic violence and genocide, and for nearly two decades I led a centre on peace and conflict studies at the University of Toronto.

Today, as I watch the unfolding crisis in the United States, I see a political and social landscape flashing with warning signals.

I’m not surprised by what’s happening there – not at all. During my graduate work in the United States in the 1980s, I sometimes listened to Rush Limbaugh, the right-wing radio talk show host and later television personality. I remarked to friends at the time that, with each broadcast, it was if Mr. Limbaugh were wedging the sharp end of a chisel into a faint crack in the moral authority of U.S. political institutions, and then slamming the other end of that chisel with a hammer.

In the decades since, week after week, year after year, Mr. Limbaugh and his fellow travellers have hammered away – their blows’ power lately amplified through social media and outlets such as Fox News and Newsmax. The cracks have steadily widened, ramified, connected and propagated deeply into America’s once-esteemed institutions, profoundly compromising their structural integrity. The country is becoming increasingly ungovernable, and some experts believe it could descend into civil war.

How should Canada prepare?