Nursing Theories By radanesia May 17, 1860 Nightingale Period: May 17, 1860 to May 17, 1990 Nursing Theories May 17, 1952 Peplau May 17, 1955 Henderson May 17, 1968 Johnson May 17, 1971 King May 17, 1973 Orem May 17, 1979 Watson May 17, 1979 Roy May 17, 1985 Roper May 17, 1987 Gordon