Chapter 14: early adulthood social and emotional development. User beware: many people remain lonely because they fear being rejected, being alone is very different from being lonely. In fact, a newborn can often add stress to a couple"s relationship. Early adulthood ages 20 to 40 (though some theorists believe it starts at 17 or 18 and extends to 44 or 45) Traditional view of development laid down by developmental psychologist robert. L01: examine the issues involved in early adulthood separation. L02: describe the conflict between intimacy and isolation. Intimacy versus isolation: erikson young adults have issues separating from parents. L03: discuss the stage of life for entry into adulthood. Seasons of life: daniel levinson"s theory of adult development people shape their lives according to the goals they consider to be most important ages 17-33 entry phase of adulthood for young men. L04: examine the emotional forces of attraction and love.