I guess I'm either an unreasonable person, or in the minority of reasonable people. To me, "stable" does not imply happy; it merely means unlikely to change or collapse. A "stable building," for example, would be one that is structurally sound, not one that houses wholesome activities or makes people happy.
Also, just look at every single chart and data point mentioned in the article. All are about one dependent variable: divorce rate. Even if there is room for reasonable disagreement about the implications of the word "stable," reading the article makes it abundantly clear which definition was intended.
Also, just look at every single chart and data point mentioned in the article. All are about one dependent variable: divorce rate. Even if there is room for reasonable disagreement about the implications of the word "stable," reading the article makes it abundantly clear which definition was intended.