Example No. 1
Major crises have major consequences, usually unforeseen ones. The Great Depression spurred isolationism, nationalism, fascism, and World War II—but also led to the New Deal, the rise of the United States as a global superpower, and eventually decolonization. The 9/11 attacks produced two failed American interventions, the rise of Iran, and new forms of Islamic radicalism. The 2008 financial crisis generated a surge in anti-establishment populism that replaced leaders across the globe. Future historians will trace comparably large effects to the current coronavirus pandemic; the challenge is figuring them out ahead of time.
Example No. 2
Major crises have major consequences. The Great Depression of the 1930s spurred hyper-nationalism, fascism, and World War 2; the 9-11 attacks brought two failed American interventions and a never-ending global war on terror; the financial crisis of 2008 generated anti-establishment populism that rose leaders across the globe; the Arab Spring in the earlier years of the last decade ushered an era of deadly proxy wars that resulted in millions of casualties.