It was impracticable to defend the Louisiana Territory from potential invaders - Britain or US might march in at any time and simply take over.Better to sell the land and get something for it while that was still an option.
<span>Napoleon needed money to fund his wars of conquest and aggression in Europe - one of the terms of the Louisiana purchase was that the US had to pay the whole price up front in gold. </span>
<span>Selling the Louisiana Territory to US would increase the power of that country in the long run,which would make them a rival for Britain - Napoleon's most hated enemy - later.</span>
The Europeans in the Caribbean felt the need to bring in enslaved Africans as laborers because the native American Indian workers had become physically weak due to diseases and the Caribbean plantations were in requirement of stronger labor force. The Africans by birth were very strong and they as slaves would perfectly suit the needs of the Caribbean plantations.
Eli Whitney was an American inventor and manufacturer. Traditionally it is said that at thirteen he invented the apple peeler but he did not patent it, what is certain is that he invented the machine to peel the cotton in 1793. This machine is a mechanical unit that it separated the seeds of the cotton, which until then was a very heavy work, by the scarce human participation.
Jethro Tull was an English agronomist, inventor of an original animal-drawn seeding machine, a prototype of the «gentleman farmer», considered one of the pioneers of the Industrial Revolution and one of the promoters of the agrarian revolution.
James Wyatt was an engineer and mechanical inventor born in Greenock, Scotland on January 19, 1736. In 1764 he received a Newcomen machine in the shop. When repairing it, he noticed the loss in performance due to the amount of steam he wasted and looked for ways to avoid the continuous heating and cooling of the piston cylinder. The solution was a separate condenser. In this way the constant loss of energy was avoided, and the consumption of coal was reduced to one third. It was the first and most important of Watt's inventions.