Ch. 1. Is Easy Divorce to Blame? -- Ch. 2. The Contribution of Out-of-Wedlock Births to the Incidence of Mother-Headed Families -- Ch. 3. Why Out-of-Wedlock Births Increase -- Ch. 4. Ex-Nuptiality in Non-European Countries -- Ch. 5. Widows -- Ch. 6. Biosocial and Demographic Theories of Parenting -- Ch. 7. Feminist and Decomplementary Theories of Parenting -- Ch. 3. Final Conclusions