未来发生大战的可能性几乎不存在了。发达国家出生率持续下降，不足以保持人口基数，连印度都猛降到2.0，勉强维持。

https://www.channelnewsasia.com/asia/india-fertility-rate-faces-sharp-decline-amid-rising-concern-over-lifestyle-factors-infertility-ageing-society-3750081#:~:text=Advertisement-,Recent%20official%20statistics%20showed%20that%20the%20general%20fertility%20rate%20in,per%20cent%20in%2010%20years.&text=If%20playback%20doesn't%20begin%20shortly%2C%20try%20restarting%20your%20device.