Complex sentence: The model or concept of society as an organism was developed in the late 19th century by Emile Durkheim, a French sociologist; and the conception of an "organismic society" was elaborated further by Herbert Spencer in his essay on "The Social Organism".
Split into simpler sentences: The model or concept of society as an organism was developed in the late 19th century by Emile Durkheim, a French sociologist. The conception of an "organismic society" was elaborated further by Herbert Spencer in his essay on "The Social Organism".