How do you say people’s lives?
Therefore – in order for the phrase to be grammatically correct, you use the plural form of ‘life’ which is lives. If ‘People’ is the name of an individual then ‘People’s life’ is correct. If you mean ‘people’ in the normal sense then you are referring to more than one life, so ‘people’s lives’ is correct.
Can you say people’s lives?
Simply put: a life is SINGULAR and lives is PLURAL. People’s life is INCORRECT at all times.