Fellow German sociologist, Ferdinand Tonnies, theorized on two crucial abstract concepts with his work on "Gemeinschaft and Gesellschaft" (lit.. 
jẹ́ òṣèré tó gba ẹ̀bùn àkàDemi fún òṣèré Ọkùnrin dídárajùlọpọ̀àwọn Ọjọ́ìbí ní àwọn ẹlẹ́bùn ADemi Ọkùnrin Òṣèré Dídárajùlọ Sago.. 