British, European and American politicians will have to manage groups who see the world in very different ways, protect their jobs and enable them to live their lives in a rapidly changing, digital economy where success means less barriers to travel and trade. Trump and Brexit won their elections on the back of declarations to protect those who see their future within a less open state, that they can recreate the world before globalisation and that international free trade has damaged their lives. It's a gamble which is unlikely pay off.
The final test will come when Trump starts showing signs of not accepting defeat at the polls in four years' time, or tries to call into question the limit on presidential terms after eight years. Then latest, will we know who Trump really is - which could be too late. It's going to be a challenging and tough time.