Despite all the anger and frustration, the Trump victory is not the end of the world. Every American president is part of an institutional structure, his power checked and balanced by other branches of government and institutions of the state. This should lead to some degree of moderation.
Yes, nationalist populism is dangerous in that it corrodes political culture and, ultimately, this institutional structure as well. It also threatens the liberal order both within and between states, as evidenced by this polarizing and often disgraceful presidential election campaign. Not only in this sense a more optimistic political project such as Clinton's would have been preferable, something this ECONOMIST essay also argued for. At least the popular vote indicates that such pragmatic and rational incrementalism still has majority support in America.
Trump promises to give the losers of globalization a voice and democratic representation - a good thing if it can lead to a reform of transnational capitalism and the political institutions that manage it at home. I fear, however, that it will only lead to more polarization, more radicalism, and more dysfunction. The candidate's campaign promised change, hate and fear. But it is the new president's duty to bring about renewal without disruption and breakdown. A tall order under the best of circumstances. Good luck, Mr. President.