A collapsing birth rate is the biggest danger civilization faces by far. Doing my best to help the underpopulation crisis.
Notes from Wikiquote
Tweet followed the birth of twins taking his reported number of children to 9.
Quote text and notes from Wikiquote: Elon Musk (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.