Joseph Green (1727 – 27 June 1786) was an English merchant who became the "best friend"[1] of Immanuel Kant.
He settled in Königsberg, Germany, and traded grains, coal, herring, and manufactured goods.
[2] Green shared with Kant a deep appreciation of the ideas of David Hume and Jean-Jacques Rousseau,[3] in addition, Green could provide a perspective on the outside world that was helpful for Kant.
[1] Meeting on a regular basis, Kant discussed his work with him, including every sentence of his "Critique of Pure Reason" prior to the 1781 publication.
[5] Green's sense of order and resulting pedantic punctuality inspired Theodor Gottlieb von Hippel to write a comedy: Der Mann nach der Uhr.