40代ひとり暮らしが日本を滅ぼす。Japan will be ruined by the single persons in their forties.

これはＡＩ（人工知能）による驚きの提言5つの内の一つです。
40代の人たちが仕事と子供の育成の両方で最も重要な役割を果たしている国は滅ばないでしょう。
http://www.nhk.or.jp/special/askai/
This one of 5 surprising suggestions made by AI.
The countries where the people in their forties are playing the most important roles both in works and children raising won’t be ruined.