Apart from the other reasons for code reviews already mentioned, there's this: an inexperienced developer (in a particular area) may not _know_ when a code revi

Apart from the other reasons for code reviews already mentioned, there's this: an inexperienced developer (in a particular area) may not _know_ when a code review is appropriate. A change that looks innocent may have wider consequences than expected. Code reviews spread knowledge, and knowledge is the true output of software engineering.