https://en.wikipedia.org/wiki/Joan_Erikson (1903-1997)
https://en.wikipedia.org/wiki/Erik_Erikson (1902-1994)
Psychosocial Crises: All first eight stages in reverse
quotient order
Joan M. Erikson, who married and
collaborated with Erik Erikson, added a ninth stage in The Life Cycle
Completed: Extended Version. Living in the ninth stage, she wrote,
"old age in one's eighties and nineties brings with it new demands,
reevaluations, and daily difficulties". Addressing these new challenges
requires "designating a new ninth stage". Erikson was ninety-three
years old when she wrote about the ninth stage.