Peace is a concept of societal friendship and harmony in the absence of hostility and violence. In a social sense, peace is commonly used to mean a lack of conflict (such as war) and freedom from fear of violence between individuals or groups. Throughout history, leaders have used peacemaking and diplomacy to establish a type of behavioral restraint that has resulted in the establishment of regional peace or economic growth through various forms of agreements or peace treaties. Such behavioral restraint has often resulted in the reduced conflict, greater economic interactivity, and consequently substantial prosperity. 'Psychological peace' (such as peaceful thinking and emotions) is perhaps less well defined, yet often a necessary precursor to establishing 'behavioral peace. ' Peaceful behavior sometimes results from a 'peaceful inner disposition. ' Some have expressed the belief that peace can be initiated with a certain quality of inner tranquility that does not depend upon the uncertainties of daily life. The acquisition of such a 'peaceful internal disposition' for oneself and others can contribute to resolving otherwise seemingly irreconcilable competing interests. Peace is not often in the state of excitement although we are happy when excited, but peace is when one's mind is quiet and satisfied. Etymology The Anglo-French term Pes itself comes from the Latin pax, meaning 'peace, compact, agreement, treaty of peace, tranquility, absence of hostility, harmony. ' The English word came into use in various personal greetings from c. 1300 as a translation of the Hebrew word shalom, which, according to Jewish theology, comes from a Hebrew verb meaning 'to be complete, whole'. Although 'peace' is the usual translation, however, it is an incomplete one, because 'shalom, ' which is also cognate with the Arabic salaam, has multiple other meanings in addition to peace, including justice, good health, safety, well-being, prosperity, equity, security, good fortune, and friendliness, as well as simply the greetings, 'hello' and 'goodbye'. On a personal level, peaceful behaviors are kind, considerate, respectful, just, and tolerant of others' beliefs and behaviors tending to manifest goodwill.