To understand why Richard Di Natale is stepping down as Greens leader, you have to appreciate two things. The first is that the Greens are not a party in any sense of the term as we understand it in Australia. An attempt has been made to portray them as the political wing of the non-government organisation movement; environmental, human rights, feminist, refugee groups coming together in the way trade unions came together towards the end of the nineteenth century to form the Australian Labor Party and similar parties around the world.