Monica Geller altered the trajectory of the entire series, having life-changing effects on its characters. Summarizing the role of Monica in the series, Martin Gitlin wrote in his book "The Greatest Sitcoms of All Time" that while her friends "were ... just out to make the most of their social lives", Monica "sought to keep the others in line" while searching for "Mr. Right", who surprisingly turns out to be close friend Chandler. Several years before Monica and Chandler became romantically involved, Cox once joked in an interview that if her character were to ever have sex with another main character, it
Ross Geller grew closer to each other though the competition between them was still visible as seen in the season three episode, "The One with the Football". Ross often comes into conflict with his close friend, Phoebe Buffay. His rationality and Phoebe's eccentricity lead to conflict over evolution, gravity, and whether Phoebe's mother was reincarnated as a cat. It is also revealed that Phoebe once mugged Ross (stealing a copy of the comic book "Science Boy" that Geller had created) when they were teenagers. The two are roommates for a few weeks when a fire forces Phoebe to move into Chandler Bing