2103. THAT SOCIETIES ARE ESPECIALLY CONSTITUTED OF SUCH AS ARE OF ONE GENUS, TOGETHER WITH THEIR SPECIES. That societies spiritual and angelic are constituted of such as are of one genus with their species is evident from the affection of similarities: for likes are associated in the world, as it were, spontaneously; in the world of spirits and in heaven it occurs by the Lord's ordering, and because societies are not conjoined from necessity, and the want of similars, as is the case in the earth, therefore are associated by the Lord such as are alike as to affections and intellectual persuasions.