A society is safest when the middle class is in control.[VI-17] The states will likely be well administered in which the middle class is numerous. Persons of about equal condition do not plot against others; neither are they plotted against. A middle class prevents both the arrogant wealthy and the impetuous proletariat from dominating the state. “Inequality is the source of all revolutions.” Poverty is a cause of revolution and crime.[VI-18] In time of war, it is important that the poor be well fed else they will cause disturbances. Aristotle might have added that in time of peace the poor should be able to feed themselves well else they will in due season cause revolution. But poverty is not the only cause of crime. Riches often lead to crime. Wealth causes the commitment of greater crimes than does poverty. The greatest offenses are not occasioned by necessity but by excess.[VI-19] In order to gratify some passion or desire, crime is often committed. Of the passions ambition and avarice are the chief causes of crime.[VI-20] Intoxication produces crime.[VI-21] The causes of social revolution are manifold. The desire for equality and the desire for inequality are common factors.[VI-22] Inferiors revolt in order that they may attain a state of equality with other persons. Equals revolt in order that they may gain superior levels of honor and status. Aristotle cited a long list of additional factors in social revolution: insolence, fear, political graft, a disproportionate increase of wealth in some part of the state, neglect of trifles in the observance of laws, dissimilarity in elements such as racial. The fundamental cause, however, of social revolution is love of gain and honor. Aristotle was not a militarist, for he believed that war in itself is not a social good. No people should be trained to conquer and obtain dominion over neighboring states.[VI-23] Military states are safe only when they are at war. After they declare peace the weight of their military burdens brings about their downfall.[VI-24] The principle of social telesis, which has been recently developed by Lester F. Ward, was foreseen by Aristotle. A society of individuals, like the individual himself, has a work to do.[VI-25] It should adapt itself to its task. Aristotle was a public health advocate. The location for an ideal city should be carefully chosen. It should be selected, first of all, with reference to the health of the citizens. This point is of greater importance than that of locating a city wisely for the purpose of public administration or war.[VI-26] The importance of a pure water supply is given almost a modern emphasis.