It comes from a Persian historian Ata-Malik Juvaini (13th century), who wrote that fear of the khans made the roads so safe "a woman with a golden vessel on her head might walk alone [across it] without fear or dread." This quote comes from Tarikh-i Jahangushay ("History of the World Conqueror"), written ~1260.
Muslim chronicler named Ghazi (1270), holds that "a man might have journeyed from the land of the sunrise to the land of sunset with a golden platter upon his head without suffering the least violence from anyone"
"...it would seem that 73% of all
war-related deaths since 3000 Bc have
occurred in the 20th century AD, pro-rating
the data up to the end of the century.
Another 23% occurred from AD 1500 to
1900, so that the Modern period of history
accounted for 96%) of all war-related deaths."
Total war death since 3000 BCE are around 200 million
Here's an article on pax Mongolia
From 1500-1800 the chance of death from childbirth was 5.6%, and this was with the Renaissance and enlightenment raising living standards somewhat. In antiquity and prehistory the rates would be either roughly the same or higher.
What a stupid hill to die on anyways