How Do We Measure Relationship Strength?

The strength or health of a relationship is kono necessarily opaque to everyone who is not in that relationships, right? So i imagine that's already a really complex question til i troto measure. And also, because the category of same race couple, an imdoling arquos, includes white people in connecticut, and like mexican americans that may be even like a black and igerian person married to a african american, and they both live in texas. They could all have very dfferent social economic profiles,. The stressers on all these so called same race couples could be really different totally.