Original sentence: Frank Dobie stopping off from the train on their way to or from Austin, giving their lectures, and catching the next train in the earlier part of the 20th century to the topical lectures more common on campus nowadays.Over the past couple decades, the Greek dominance of social life has lessened, with about 1/3 of campus belonging to a social fraternity or sorority, a decline from being a majority of students.Southwestern has a history of drawing prolific lecturers to campus, including Helen Keller and alumnus J.Southwestern hosts several national social fraternities and sororities, including the fraternities Pi Kappa Alpha, Phi Delta Theta, Kappa Sigma, and Kappa Alpha Order, along with sororities Alpha Delta Pi, Delta Delta Delta, Alpha Xi Delta, and Zeta Tau Alpha.Speakers at the annual Brown Symposium include such a range as author Isaac Asimov (through a videoconference) in the early 1980's to Nobel Laureate economist Joseph Stiglitz in 2002.The Fleming Lecture series has drawn such names recently as presidential advisor Karen Hughes(2003), Archbishop Desmond Tutu (2004), and former Pakistani Prime Minister Benazir Bhutto (2005)
Edited sentence: Over the past couple decades, the Greek dominance of social life has been phased out, with fewer than a third of campus belonging to the social Greek organizations, especially following the four year suspension of the Kappa Alpha order on campus.Southwestern hosts several national social fraternities and sororities, including the fraternities Pi Kappa Alpha, Phi Delta Theta, Kappa Sigma, and Kappa Alpha, along with sororities Alpha Delta Pi, Delta Delta Delta, Alpha Xi Delta, and Zeta Tau Alpha