Read a biography of Hemingway borrowed from the library.
I have read almost all of Hemingway's novels and short stories, some several times, e.g. A Farewell To Arms, The Sun Also Rises For Whom the Bell Tolls, The Old Man and the Sea, Across the River and into the Trees,, etc
While I enjoyed reading them, my main criticism of Hemingway is that he is a hedonist, intent on his own pleasures, and with no social commitment He wants to show to the world that he is a man, and therefore his works, and his life, abound with machismo and braggadocio. He loves bull fighting, big game hunting, deep sea fishing, cock fighting, and, of course, heavy drinking---all to prove to the world that he is masculine..
Except perhaps for ' For Whom the Bell Tolls ', his works serve no social purpose.
Hemingway had cultivated a style of writing based on the ' iceberg theory', carefully calculated to make his story sell and thus make a lot of money for him. Otherwise i think he cared a damn for what happened to the world and to others.