History of Classification By RebeccaEL Oct 7, 1700 Linnaeus 2 kingdoms Oct 7, 1894 Ernst Haeckel 3 kingdoms Oct 7, 1956 Herbert Copeland 4 kingdoms Oct 7, 1959 Robert Whittaker 5 kingdoms Oct 7, 1977 Carl Woese 6 kingdoms Oct 7, 2000 Aristotle 2 kingdoms Oct 7, 2011 Today
