Which enlightenment philosopher wrote of a social contact by which citizens agreed to live together to protect their rights and which citizens would obey the general will of the community

answer; john jacques rousseau ;

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.