Civil law is one thing, and has btw nothing to do with crime and punishment - that would be criminal law.
Protecting a market from becoming a monopoly is another thing entirely; punishment isn't a category here but the overwhelming interest to enable everybody to participate in a market within reason. Shielding individuals from the law of the strong (as in the jungle) and the natural tendency for monopolies is the entire point for a society to begin with.
IANAL, but this definition leaves a bit to be desired. I thought the term "civil law" is almost universally synonymous with the law other than the criminal, constitutional/non-law-of-nations law even in non Common Law countries. Specifically, it is used for law with roots in the Code civil (as opposed to Code pénal etc.) in those parts of Europe having Napoleonic law traditions, with connotations of Enlightenment and positive right theories.
Protecting a market from becoming a monopoly is another thing entirely; punishment isn't a category here but the overwhelming interest to enable everybody to participate in a market within reason. Shielding individuals from the law of the strong (as in the jungle) and the natural tendency for monopolies is the entire point for a society to begin with.