I'd argue the myriad reasons aggregate up into finite categories. Trust and respect are definitely basic ones. You can develop and exercise how you trust and re

I'd argue the myriad reasons aggregate up into finite categories. Trust and respect are definitely basic ones. You can develop and exercise how you trust and respect people, or these can be fragile, and their tolerances and resiliency can be mismatched, but among others, I'd assert these have predictive power in the persistence of a union. There are no conditions, as people just do what they do, but if the effect of relating does not yield these, I'd bet against it.