The political theorist David Held argued that we have outgrown our national bound­aries through increasing globalisation, and now live in "overlapping communities of fate" from where we should form a cosmopolitan democracy at a global level. Today, we are experiencing a planetary crisis and I believe it is time to see ourselves as members of one globally dispersed species that must cooperate to survive. The scale of the climate crisis requires new global cooperation and, I believe, new international citizenship with global bodies for migration and for the biosphere – new authorities that are paid for by our taxes and to which nation states are accountable.