and people's militias to enslave, kidnap, or murder a major proportion of California Native Americans, who were sometimes contemptuously referred to as "Diggers", for their practice of digging up roots to eat. California governor Peter Burnett predicted 1851: "That a war of extermination will continue to be waged between the two races until the Indian race becomes extinct, must be expected. While we cannot anticipate the result with but painful regret, the inevitable destiny of the race is beyond the power and wisdom of man to avert." California state forces, private militias, Federal reservations, and sections of the US Army all participated in the campaign that caused the deaths of many California Indians with the state and federal governments paying millions of dollars to militias to murder Indians, while many starved on Federal Reservations because of their caloric distribution reducing from 480–910 to 160–390 and between 1,680 and 3,741 California Indians were killed by the U.S. Army themselves. Between 1850 and 1852 the state appropriated almost one million dollars for the activities of militias, and between 1854 and 1859 the state appropriated another $500,000, almost half of which was reimbursed by the federal government. Guenter Lewy, famous for the phrase "In the end, the sad fate of America's Indians represents not a crime but a tragedy, involving an irreconcilable collision of cultures and values" wrote that what happened in California may constitute genocide: "some of the massacres in California, where both the perpetrators and their supporters openly acknowledged a desire to destroy the Indians as an ethnic entity, might indeed be regarded under the terms of the convention as exhibiting genocidal intent." By one estimate, at least 4,500 California Indians were killed between 1849 and 1870. Contemporary historian Benjamin Madley has documented the numbers of California Indians killed between 1846 and 1873; he estimates that during this period at least 9,400 to 16,000 California Indians were killed by non-Indians. Most of the deaths took place in what he defined as more than 370 massacres (defined as the "intentional killing of five or more disarmed combatants or largely unarmed noncombatants, including women, children, and prisoners, whether in the context of a battle or otherwise"). Professor Ed Castillo, of Sonoma State University, estimates that more were killed: "The handiwork of these well armed death squads combined with the widespread random killing of Indians by individual miners resulted in the death of 100,000