I think the jury is still out on the impact of all the other social networks.

If the connection between fast falling birthrates and smartphone addiction is proven, the total global loss of life (in this case, never born life) due to the products that many of us here helped craft into perfection may rival that of Mongol expansion under Genghis Khan, and Twitter/X is hardly the worst offender in that group. Even Twitter's impact on the balance of left/right politics in the world is relatively transient and small when judged against this horrible development whose aftereffect will stalk the world for a century.

Yes, it wasn't an actual intent of people like Zuckerberg, but as far as catastrophic failures of civilizations go, they don't have to be intended.