The minute that we are born, we immediately take a number of roles, including eater, sleeper and sneezer.
As we grow older, we are called to play and practice many more personal and social roles, which is how we develop, grow and mature.
Here's a little "Box O' Roles" that explains psychodramatic role theory in a fun and graphic way, courtesy of my psychodramatist colleagues Nina Garcia and Dale Richard Buchanan.