Peace means 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.
"Psychological peace" (such as peaceful thinking and emotions) is less well-defined, yet perhaps a necessary precursor to establishing "behavioural peace". Peaceful behaviour sometimes results from a "peaceful inner disposition". Some have expressed the belief that peace can be initiated with certain inner qualities—such as tranquility, forbearance, respect for others, compassion, self-control, courage, moderation, forgiveness, good temper, caution, and perspective—that do 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 conflicts.
The term 'peace' originates from the Anglo-French pes, and the Old French pais, meaning "peace, reconciliation, silence, agreement" (11th century). 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 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, 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 behaviours are kind, considerate, respectful, just, and tolerant of others' beliefs and behaviors – tending to manifest goodwill. This understanding of peace can also pertain to an individual's introspective sense or concept of her/himself, as in being "at peace" in one's own mind, as found in European references from 1200.