[Answer] What does Mill think is the highest human good (the summum bonum)?

Answer: Happiness

Most relevant text from all around the web:

What does Mill think is the highest human good (the summum bonum)? Mill argues that our first obligation to society is the duty not to harm the interests of others or interfere with their rights . What does he think is the source of this obligation? Mill argues that our first obligation to society is the duty not to harm the interests of others or interfere with their rights . What does he think is the source of this obligation? Summum bonum is a Latin expression meaning "the highest good" which was introduced by the Roman philosopher Cicero to correspond to the Idea of the Good in ancient Greek philosophy. The summum bonum is generally thought of as being an end in itself and at the same time containing all other The term was used in medieval philosophy. In the Thomist synthesis of Aristotelianism and Christianity the highest good is usually defined as the life of the righteous and/or the life led in communion with Godand … In the knowledge therefore and love of God as the Supreme Good consists man's highest good in the subjective order. This is brought out in those passages in which even sensuous beauty is described as worthy of love and external activity sensible ...

Disclaimer: 

Our tool is still learning and trying its best to find the correct answer to your question. Now its your turn, "The more we share The more we have". Comment any other details to improve the description, we will update answer while you visit us next time...Kindly check our comments section, Sometimes our tool may wrong but not our users.

Are We Wrong To Think We're Right? Then Give Right Answer Below As Comment