In addition to Dodsworth, Arrowsmith, and It Can't Happen Here, this man wrote about a realtor rebelling against his society, and another novel sees Carol marry Will Kennicott and settle in Gopher Prairie.
In one of this man's works, the title character Sam and his wife split after a trip to Europe.  In another work by this man, a doctor has to deal with the bubonic plague and research institution he works for.  This author also wrote about Buzz Windrip and a Fascist takeover of America.  In addition to Dodsworth, Arrowsmith, and It Can't Happen Here, this man wrote about a realtor rebelling against his society, and another novel sees Carol marry Will Kennicott and settle in Gopher Prairie. For 10 points, name this author of Babbitt and Main Street.
In one of this man's works, the title character Sam and his wife split after a trip to Europe.  
Harry Sinclair {Lewis}