 Details of the mistreatment of students had been published numerous times throughout the 20th century, but following the closure of the schools in the 1960s, the work of indigenous activists and historians led to a change in the public perception of the residential school system, as well as official government apologies, and a (controversial) legal settlement.Colonization had a significant impact on First Nations diet and health.According to the historian Mary-Ellen Kelm, "inadequate reserve allocations, restrictions on the food fishery, overhunting, and over-trapping" alienated First Nations from their traditional way of life, which undermined their physical, mental, emotional, and spiritual health.