The idea of an unconditional basic income is in fashion. From Finland to Switzerland, from San Francisco to Seoul, people talk about it as they have never done. Twice before, basic income was the object of a real public debate, albeit briefly and limited to one country at a time. In both episodes, the centre left played a central role.

The first debate took place in England in the aftermath of World War I …

The second debate took place in the United States in the late 1960s and early 1970s …