Wars tend to involve civilians getting hurt, because yeah, it’s cheaper and easier to disregard international law.
I wouldn’t generalize that to evil always winning vs good, though. Human life is complicated, and mean, but progress gets made anyway. There’s a reason most people dislike war.
The math is not right. Percentages don’t multiply like that.
A change from 0.25 to 7.25 over 71 years means an annual increase of about 5%. That 5% annual change, starting with $7.25 15 years ago, would take us to around $15 today.