Pearl S. Buck is a humanitarian writer and her writings are of moral issues that deal with many aspects of the sordid atmosphere of the modern world and the inner torments of mankind. Her novels are about problems exist in the real society where she lived and wrote her novels. This book is a thematic study of two of Buck’s novels: All Under Heaven and The Devil Never Sleeps. In All Under Heaven Pearl Buck depicts the bad consequences of the Cold War on people’s life and criticizes the racial discrimination caused by the Cold War and tries to reduce that racial superiority because she believed that all under heaven are one. Also, she enlightens us about dilemmas faced by masses of American women. She criticizes women’s passive role and doing nothing in order to improve their situation in a society dominated by men. In The Devil Never Sleeps, Buck presents people’s sufferings and wretched life because of communism. She shows that most of the revolutionary parties’ promises are not true. They promise their followers a perfect life, demolishing of classes and people will be given whatever they want or wish. But, only then, people will discover that this is not really what they were looking for, or wished.