In his 3 examples, Peter addresses people who are stuck in a binding social relationship which they cannot easily escape. His advice to all 3 situations is the same: As aliens and strangers you are called to live in a hostile unbelieving world. When possible show the unbelievers that you are a person of virtue by behaving in a submissive and respectful way. Love your oppressor so that your faith is not interpreted as rebellion and hostility, and they may see God's grace through you.