It's difficult to pinpoint one specific "biggest" writer in the world, as there are many successful and influential writers across different genres and time periods. However, some of the most famous and widely-read writers in history include William
Shakespeare, Jane Austen, Ernest Hemingway, Virginia Woolf, Fyodor Dostoevsky, Charles Dickens, Mark Twain, George Orwell, Gabriel Garcia Marquez, and J.K. Rowling.
These writers have left an enduring impact on literature and continue to be read and studied by people all over the world.