“By anarchist spirit I mean that deeply human sentiment, which aims at the good of all, freedom and justice for all, solidarity and love among the people; which is not an exclusive characteristic only of self-declared anarchists, but inspires all people who have a generous heart and an open mind.”
― Errico Malatesta
It’s a nod to The Diggers who were a group of radicals dating back to the 1600s in England, sometimes seen as forerunners of modern anarchism, and also associated with agrarian socialism and Georgism. They were known as Diggers because of their attempts to farm on common land.