I believe it would be the Jim crow law
The jim crow law is a set of regulations that is aimed to racially segregate the infrastructure that can be used by black and white citizens after the reconstruction.
The laws prohibit blacks citizens to use the same schools, public transportation, restaurants, or hospital as the white citizens.
Since the infrastructures that can be used by black citizens typically lower in quality, it really limited the chance that black people have to advance and prosper in the society.
Spain and Portugal were the two nations that had a head start in the age of exploration
The first computer or ENIAC (Electronic Numerical Integrator Analyzer and Computer) which the University of Pennsilvania built to do ballistics calculations for the U.S. and other early computers proved to many universities and corporations that these machines were useful because They could solve problems in 30 seconds that otherwise would have taken 12 hours by hand.
For this reason, most of the first computers in the United States were purchased by universities and corporations in spite of the space ,manpower and the tremendous investment of money, they demanded in this early stages.
the War Hawks resented British violation of U.S. maritime rights and treatment of U.S. sailors. they wanted a declaration of war against the British. as the Congressional leader of the Democratic-Republican Party, Henry Clay took charge of the agenda, supporting the War of 1812 with Great Britain. later, as one of the peace commissioners, Clay helped negotiate the Treaty of Ghent and signed it on December 24, 1814. in 1815, he helped negotiate a commerce treaty with Britain.
It was used to justify to protecting america’s national interests in its “back yard”