The "Theses on Feuerbach" are eleven short philosophical notes written by Karl Marx as a basic outline for the first chapter of the book The German Ideology in 1845. Like the book for which they were written, the theses were never published in Marx's lifetime, seeing print for the first time in 1888 as an appendix to a pamphlet by his co-thinker Friedrich Engels. The document is best remembered for the epigrammatic 11th thesis and final line: "Philosophers have hitherto only interpreted the world in various ways; the point is to change it."