EVANSTON — With doomsday approaching at the end of 2012, people and communities are desperately seeking ways to do good and collect some positive karma. Northwestern University’s Panhellenic Association (PHA) is no exception. At the last Greek Life Summit, the Panhellenic board decreed that the sororities had to diversify their new pledge class, encouraging them to select members that are drastically different from the existing sisters. When asked if they believed the chapters would find this new law difficult to