Socialists watched in despair when dockers and building workers marched in support of Enoch Powell's "rivers of blood" speech. But the tide turned and a few years later dockers were marching for Grunwick strikers.
This year the left will be commemorating the events of May 1968, when students and workers rose up in Paris.
But those events were preceded in Britain by a dismal affair. The gutter press and right wing politicians launched a huge campaign against Asian families fleeing persecution in East Africa. The Labour government and nearly all the Labour MPs joined in. They pushed a bill through parliament in just one day, removing the right of Asians to enter this country even through they held British passports.