http://www.slate.com/articles/arts/tv_club/features/2014/mad_men_season_7_part_1/episode_2/mad_men_and_race_shirley_peggy_and_the_flowers_on_a_day_s_work.html

Peggy’s a-hole behavior (http://www.thefrisky.com/2014-04-21/when-did-peggy-olson-become-mad-mens-resident-a-hole/) sequence, says Seth Stevenson, "seems like a pretty solid metaphor for midcentury American racial relations.”
Read more at http://www.hitfix.com/tv-tattle#jRqssvv8DIgRF2Gv.99