Green movements have long debated, and often supported, basic income as a way to lead more sustainable lives, less dominated by work and consumption. But political support for basic income is not limited to Greens. Basic income is variously credited with being a new 21st-century form of solidarity, a way to boost economic growth, and a means to rebalance work between women and men. For every argument in its favour, there is a complementary counter waiting to be made. The debate opens up huge questions: political, economic, moral, and practical. Basic, will I be able to live off it? Cash, where will all this money come from? Unconditional, what if people just sit around? Individual, but what about society? To delve deeper, the Green European Journal spoke to experts and activists from around the world – some advocates, some critics. In the coming months, we will continue to follow basic income developments in Europe and beyond, not to advocate it, but because of the key questions it requires us ask.