Pearl Buck(1892--1973)was born in Hillsboro, West Virginia. She grew up in China, but  was educated at Randolph-Macon Woman's College. After her graduation she returned to China and lived there until 1934 with the exception of a year spent at Cornell University, where she took an MA in 1926.Pearl Buck began to write in the twenties; her first novel, East Wind; West Wind, appeared in 1930.It was followed by The Good Earth (1931),Sons(1932),and A House Divided(1935),together forming a trilogy on the stories of the family of Wang. The Good Earth stood on the American list of bestsellers for a long time and earned her several awards, including the Pulitzer Prize and the William Dean Howells Medal. She also published The first Wife and Other Stories(1933),All Men are Brothers(1933),The Mother(1934),and This Proud Heart(1938).The biographies of her mother and father, The Exile and Fighting Angel, were published in 1936 and later brought out together under the title of The Spirit and the Flesh(1944). Pearl Buck's works after 1938 are too many to speak about. Her novels have continued to deal with the differences between East and West. Her interest has spread to such countries as India and Korea. Pearl Buck was active in many charity organizations; in particular she set up an organization for the adoption of Asian-American children and took an active interest in children with low IQ. According to the passage, Pearl Buck was interested in  _  .
American history politics in India and Korea writing novels about war doing charity work