The head of the United Nations agency supporting Palestinian refugees warned on Monday that a break down of civil order in Gaza had allowed widespread looting and smuggling and blocked aid deliveries. More than eight months of war have led to desperate humanitarian conditions in the besieged Palestinian territory and repeated UN warnings of man-made famine there. “Gaza has been decimated,” UNRWA chief Philippe Lazzarini told the agency’s advisory body. “We have witnessed unprecedented failures of humanity in a territory marked by decades of violence,” he said, according to a written version of…