History of Classification By jgierbolini Oct 7, 1700 LInnaeus Two Kingdoms Oct 7, 1894 Ernst Haeckle Three Kingdoms Oct 7, 1956 Herbert Copeland Four Kingdoms Oct 7, 1959 Robert Whittaker Five Kingdom Oct 7, 1977 Carl Woese Six Kingdoms Oct 7, 2000 Aristotle Two Kigndoms
