According to a study by researchers at the University of California, Berkeley and Princeton University, published on Aug. 1 in the journal “Science” described that Shifts in climate is strongly linked to human violence around the world, even relatively minor departures from normal temperatures or rainfall can substantially increase the risk of conflict, Personal violence and crime such as murder, assault, rape, and domestic violence, Intergroup violence and political instability, like civil wars, riots, ethnic violence, and land invasions .The study, which includes more data than prior research in this field and covers all major regions of the globe, Examples include spikes in domestic violence in India and Australia; increased assaults and murders in the United States and Tanzania; ethnic violence in Europe and South Asia; land invasions in Brazil; police using force in the Netherlands; civil conflicts throughout the tropics; and even the collapse of Mayan and Chinese empires.