We were introduced to the major theories of adult development, primarily those of Erikson and Levinson, and we learned about Arnett’s “emerging adulthood,” a potentially new stage involving the transi...We were introduced to the major theories of adult development, primarily those of Erikson and Levinson, and we learned about Arnett’s “emerging adulthood,” a potentially new stage involving the transition from adolescence to young adulthood, with young adults taking on “adult roles” later than expected.