Simone de Beauvoir's The Second Sex: "Introduction: Woman as Other"

Read this introduction to de Beauvoir's The Second Sex. As you read, pay close attention to the historical story de Beauvoir gives about the development of woman as "the Other" of man. What is an abstract concept, according to de Beauvoir? How is woman an abstract concept? Also consider how, according to both Sartre and de Beauvoir, no one is born with a predetermined essence: You become who you are. What does de Beauvoir mean when she suggests that a person is not born a woman, but rather becomes one?