LONDON — Europe was pummeled by crises from start to finish in 2015, with terrorist attacks, bankruptcy brinkmanship and an unparalleled refugee influx combining to leave continental unity in tatters by year’s end.

But instead of relief, 2016 could bring an unraveling.

In addition to the flash points of the past year — all of which are poised to flare again — Britain is likely to throw fresh instability into the mix with a referendum on whether to leave the European Union. Once judged an unlikely prospect, many observers now see a 50-50 chance that populist-minded, immigration-fearing British voters will elect to cut this island nation adrift from a continent beset by existential struggles.

Read the article “A British Exit from European Union Could Be Just the Start of Europe’s Unraveling in 2016” on washingtonpost.com.