What is the main conflict in Angels in America by Tony Kushner?

Angels in America is the first major work of playwright Tony Kushner, and its astounding success has turned the man and his writing into cultural icons of the late-twentieth century. Referred to by scholar John M. Clum in Acting Gay: Male Homosexuality in Modern Drama as "a turning point in the history of gay drama, the history of American drama, and of American literary culture," Angels has received numerous awards and critical accolades, including the Pulitzer Prize for drama and the Antoinette Perry (Tony) Award for best play. It has been produced in dozens of countries around the world and translated into several languages, including Chinese.