Relationship between substance abuse and mental illness

Does a relationship between substance abuse and mental illness and anti-social behaviour exist? Discuss. Prepare an essay of no less than 1000 words discussing this question. Consider the following concepts: 1. Does substance abuse cause anti-social behaviour? 2. Is substance abuse always an element of anti-social behaviour? 3. Does the elimination of substance abuse remove anti-social behaviour? 4. Alcohol and tobacco can also be abused. 5. Does substance abuse cause mental illness? 6. Does mental illness cause anti-social behaviour? 7. Does appropriately medicated mental illness cause anti-social behaviour? 8. Are people with substance abuse issues discriminated against?