Under what circumstances (if any) it permissible to use capital punishment on persons convicted of certain crimes?

• • Under what circumstances (if any) it permissible to use capital punishment on persons convicted of certain crimes?
• • Should legal marriage be available to couples of the same sex?
• • How does the stage of pregnancy affect the morality of abortion?
• • Should marijuana be legal for recreational use?
• • Under what conditions is physician-assisted suicide morally acceptable?
• • Is it ethically acceptable to raise animals for food on factory farms?
• • What kinds of restrictions on gun ownership (if any) would be beneficial to society?
• • Should it be legal for employers to discipline or fire employees on the basis of their content aired in social networks, even if this activity was not done on the job?