elective affinity

noun3

1. •
   A process by which two cultural forms (e.g. religious, intellectual, political or economic) having certain similarities or kinships enter into a relationship of reciprocal attraction and influence, and mutual reinforcement.
2. •
   (old-fashioned) The feeling of being attracted to or sympathetic with someone or something.
3. •
   (no longer used) The tendency of a substance to combine with some specific substances more readily than others.