Early modernist graffiti can be dated back to box cars in the early 1920s yet the graffiti movement seen in today's contemporary world really originated through the minds of political activists and gang members of the 1960s. The pioneering era of graffiti took place during the years 1969 through 1974.
Georg Wilhelm Friedrich Hegel (often known as G. W. F. Hegel or Georg Hegel) (1770 - 1831) was a German philosopher of the early Modern period. He was a leading figure in the German Idealism movement in the early 19th Century, although his ideas went far beyond earlier Kantianism, and he founded his own school of Hegelianism.
Martin Heidegger criticized and expanded Husserl's phenomenological enquiry (particularly in his Being and Time of 1927) to encompass our understanding and experience of Being itself, and developed his original theory of Dasein (the non-dualistic human being, engaged in the world).