The final chapter reviews points from earlier chapters, and Darwin concludes by hoping that his theory might produce revolutionary changes in many fields of natural history. Although he avoids the controversial topic of human origins in the rest of the book so as not to prejudice readers against his theory, here he ventures a cautious hint that psychology would be put on a new foundation and that "Light will be thrown on the origin of man". Darwin ends with a passage that became well known and much quoted:
మానవుల గురించి జాతిపుట్టుక (ఆన్ ది ఆరిజిన్ ఆఫ్ స్పీసీస్) అనే పుస్తకంలో చివరి అధ్యాయంలో ఆశించడాన్ని డార్విన్ సూచిస్తున్నాడు.
that psychology would be put on a new foundation and that "Light will be thrown on the origin of man"