Tolstoy's observation reverses what we might expect—that unhappiness should be more universal and easier to recognize. What he captures is that contentment follows recognizable patterns (security, trust, respect), while misery branches into countless specific failures unique to each household's particular betrayals and broken promises. A marriage collapses over infidelity in one home, financial ruin in another, a parent's coldness in a third; you cannot write a manual for happiness that works everywhere, but the fundamental ingredients are monotonously similar. This is why we often feel alone in our suffering even when surrounded by others in pain—and why listening to someone's specific unhappiness requires genuine attention rather than platitudes.