This year world leaders struggled to manage the fallout from the erratic tenant in the White House – as China flexed its imperial muscles. We look back at the events that created the most turbulence

Click here for 2019’s reasons to be cheerful

A year of high anxiety was rendered more alarming by intensifying clashes of interest between world powers. As international cooperation declined, and nationalist agendas gathered strength, China, the US, Russia and Europe, and their respective allies, emulators and proxies, engaged in often dangerous competition.

The Chinese communist regime’s increasingly assertive behaviour at home and abroad, reflecting the authoritarian outlook of its paramount leader-for-life, Xi Jinping, produced head-on collisions with western countries, notably over Hong Kong, trade, technology and the repression of the Uighur Muslim minority in Xinjiang.