it depends on if you mean the ball or the sport
the ball got it's idea from a Rugby ball
the game started when a group of guys enjoyed rugby but wanted different rules so they created the NFL then later there was a guy who wanted to move the Chicago cardinals to dallas but was denied so he and his friends created the AFL later there was a big game between the NFL champions and the AFL champions NFL won and then they meged into one system the NFL then the AFC and the NFC was created
The waterwheel.
Iron casting
need and invention
what events led to Lenins' takeover of the revolution
the invention that led up to the gas mask was a cloth in front of your face
dodo
well johnny appleseed
The Invention of the Telegraph by Joseph Henry in 1831 led to the invention of the phone.
CD's
The hydrophone :)
The Walkman led to the invention of the iPod.
The general acceleration of electronic knowledge, leading to the idea that it would be possible to transmit moving pictures through the ether.
The steam engine
A caveman.
The Wright brothers' invention of the airplane led to advancements in air transportation.
Exactly that...that one invention leads to another invention. For example. The invention of the car, led to the invention of the assembly line
The Reformation was a 16th-century movement in Christianity that led to the split between the Roman Catholic Church and various Protestant groups. Events that led to the Reformation include the criticism of the Church's practices, the publication of Martin Luther's 95 Theses in 1517, and the invention of the printing press, which helped spread ideas more widely.