Henry Ford invented the assembly line manufacturing in about 1915.
Before that the carriages both horseless and horse were made individually.
Ben Franklin and Thomas Edison came along about this time.
The internal combustion engine was just coming into being.
Before that it was steamships and locomotives at the turn of the century.
Mark Twain was a steamboat and riverboat captain on the Mississippi River running from Minneapolis to New Orleans.
Alcohol and highbred carbohydrates and caffeine and nicotine and wheat and milk and honey.
We had all those for hundreds and thousands of years but only recently had added cocaine and amphetamine.
Both about 1915 for round numbers and to complete my 100 year theory and discovery and hypotheses.
The effects of processed sugar and corn syrup and hybrid and highbred carbohydrates and alcohol and caffeine and nicotine and cocaine and amphetamine.
Wheat and milk and honey.
All of which are mans doings.
Normal amounts of carbohydrates had always been consumed by man before the high breeding and farming and agriculture on vast scales had begun.
Marketing grains and fruits and vegetables along with alcohol and nicotine and caffeine and wheat and milk and honey.
And then along came cocaine and amphetamine and methamphetamine.
Manufactured right along with the wheat and the milk and the honey.
Stimulant drugs because of the unnatural concentrations and quantities we consume daily..
And then cocaine and amphetamines which most of us don't consume but many do..
Thousands of tons annually..
ISIS and Boko Haram..
The reason we are on the moon..