High school keep starting to early here's why

Highschools start early because it might increase academic achievements and so that the students will get more sleep.

high schools start too early because teenagers' natural circadian rhythm is adjusted to later hours of the night, making it hard for most teenagers to feel sleepy before 11 PM. they don't get the healthy amount of sleep that they need because they have to wake up early for school

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.