Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
민약설은 사회 계약의 중요성을 강조합니다.Minyakseol-eun sahoe gyeyak-ui jungyoseong-eul gangjo-hamnida.The theory of Rousseau emphasizes the importance of the social contract.