What is the main conflict in Doubt by John Patrick Shanley?

John Patrick Shanley's drama Doubt premiered at the Manhattan Theatre Club on November 23, 2004, before moving to Broadway, at the Walter Kerr Theatre, in March of the following year. It instantly became the most celebrated play of the season, taking the 2005 Pulitzer Prize for Drama; best new play awards from the New York Drama Critics' Circle, the Lucille Lortel Foundation, the Drama League, the Outer Critics Circle, and the Drama Desk; the Obie; and four Tony Awards (best play, best actress in a play, best featured actress in a play, and best director). The play was published by Theatre Communications Group in 2005.