T 3.2.7.1

NOTHING is more certain, than that men are, in a great measure, govern'd by interest, and that even when they extend their concern beyond themselves, 'tis not to any great distance; nor is it usual for them, in common life, to look farther than their nearest friends and acquaintance. 'Tis no less certain, that 'tis impossible for men to consult their interest in so effectual a manner, as by an universal and inflexible observance of the rules of justice, by which alone they can preserve society, and keep themselves from falling into that wretched and savage condition, which is commonly represented as the state of nature. And as this interest, which all men have in the upholding of society, and the observation of the rules of justice, is great, so is it palpable and evident, even to the most rude and uncultivated of human race; and 'tis almost impossible for any one, who has had experience of society, to be mistaken in this particular. Since, therefore, men are so sincerely attach'd to their interest, and their interest is so much concern'd in the observance of justice, and this interest is so certain and avow'd; it may be ask'd, how any disorder can ever arise in society, and what principle there is in human nature so powerful as to overcome so strong a passion, or so violent as to obscure so clear a knowledge?