American Indians have the highest rate of suicide of all the ethnic groups in the United States. Native Americans are most prevalent in California. The main causes of this high level of suicide are "socioeconomic characteristics, substance abuse, barriers to mental health services and acculturation" (Olson 2006). This finding is more related to the psycho aspect of cultural geography.

https://journals.sagepub.com/doi/pdf/10.1177/1524838005283005