Sigwart, Christoph (1830-1905)(2)
Spencer, Herbert (1820-1903)(2)
Carpenter, William Benjamin (1813-1885)(1)
Darwin, Charles (1809-1882)(1)
Gierke, Otto von (1841-1921)(1)
Hegel, Georg Wilhelm Friedrich (1770-1831)(1)
Pfänder, Alexander (1870-1941)(1)
Rousseau, Jean-Jacques (1712-1778)(1)