Need how and why european diseases did more to destroy the people of south america (inca, maya, aztecs) than the wars and take over by the spanish and the portuguese. short answer!

All it takes is for one person to have a disease, measles for example, and to spread it. Measles is deathly and affects and spreads throughout the body rapidly, and it is HIGHLY CONTAGIOUS. It could spread like a wildfire to thousands of people. When comparing it to wars and conquers by the Spanish and Portuguese, it only killed about 3,000 people or so, which is nothing compared to the diseases. Measles had a death rate at around 1.3 Million or so

Explanation:

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.