 But [the woman studying law and politics] would also notice that this equality would involve them in war or a permanent state of mutual distrust, which would be inconsistent with their objective, and that the natural light of reason would dictate that they could not live in peace unless everyone surrendered their rights and made contracts or conventions. She would also see that, in order to validate these decisions and to protect people from anxiety, it would be necessary to have recourse to a third party who would have authority to force everyone to observe what they had promised to others. (T1en 164; TTfr 106; see also Hobbes, Leviathan, part I, chap. 13–15)