"Our era will be remembered for the triumphant march of a globally unifying rightwing - a Nationalist International - that sprang out of the cesspool of financialised capitalism. Whether it will also be remembered for a successful humanist challenge to this menace depends on the willingness of progressives in the United States, the European Union, the United Kingdom as well as countries like Mexico, India and South Africa, to forge a coherent Progressive International." This is how Yanis Varoufakis began an article on the need for a Progressive International, that included comments from Bernie. Bernie wrote a similar article that included comments from Yanis. I cannot make any description better than theirs.
But it is worth considering the rise of the nationalist international, how far this nationalism has spread so check this wiki article.
Whilst they manipulate to divide us and whilst we are foolish enough to lack Unity, this lurch to the right will continue and will hurt us. When will people take it seriously.