Elon Musk issues a population-collapse warning.

Tech tycoon Elon Musk recently stated his worries for the "end of humanity" once more.

Welcome to the day, Elon. Don't worry; humanity will survive.

He called population decline "the biggest threat to civilisation.

 Japan will eventually vanish unless something happens to make the birth rate higher than the death rate.

The world will suffer greatly from this, "He stated in a tweet on May 9. 

 Japan's population would drop by a record 644,000 people to 125.5 million in 2021 prompted the post.