Final answer:
The phrase 'Marriage is a monopoly, and not of the least invidious sort' means that marriage is an exclusive control of another person without any negative intentions.
Step-by-step explanation:
The phrase 'Marriage is a monopoly, and not of the least invidious sort' means that marriage is an exclusive control of another person, implying a lack of competition or interference from others. It suggests that in marriage, one person has complete control over another without any negative or harmful intentions.
For example, in a traditional marriage, the husband may have control over the wife's decisions and actions. However, it is important to note that this phrase does not apply to all marriages, as the dynamics and power balance vary in different relationships.