To avoid duplication, the importance of the timing of the exposure and the impact of risk factors on long-term health and development will be given attention. [...] This will prepare the reader for discussions of the Aboriginal health research environment, and how the efforts of the Canadian government to oppress the cultures, traditions, and community structures of Aboriginal peoples has caused collective trauma and grief that is thought to have cumulated as health problems in many Aboriginal communities (First Nations Centre, 2005; Kirmayer, Brass, & Tait, [...] While it has been documented in the literature that patterns of migration have led to an increase in the number of urban Aboriginal people and Aboriginal homeless,, consider the following quote: Increasing patterns of migration among Aboriginal people from the reserve to urban centres has led to a dramatic increase in the number of Aboriginal people now permanently residing in urban areas. [...] As demonstrated by the figure below the Aboriginal population of Canada is situated in every province and territory, and makes up the majority of the population in Nunavut and the Northwest Territories, and is a large portion of the population in the Prairie Provinces. [...] Contradiction in the evidence can be explained by the fact that there are trade-offs between the accessibility of a community and the isolation of the community; namely, the potential negative impacts of colonization versus accessibility to amenities.