World War 1 is the correct answer.
Elon Musk is the CEO and co-founder of Tesla; CEO, leader designer, and founder of SpaceX; CEO and founder of Neuralink; and founder of The Boring Company. With an estimated net worth of $197 billion, he is the richest man in the world.
Answer:
The plague or Black Death brought about a significant decline in feudalism. In 1348 The Black Death swept through the majority of Europe killing people in the millions. This massive tragedy resulted in the decline of Europe's labor and surf forces and in consequence, the income and wages for the peasant class increased substantially. The higher class naturally did not accept this which in return angered the lower class; thus, resulting in turmoil between both classes. The peasant class soon overcame the higher class effectively abolishing serfdom and feudalism in Europe as a whole.
The shifting of powers from lords to common people saw the decline of feudalism as well. The Hundred Years war brought about new ideas and inventions most notably the inventions of firearms, cannos, and gunpowder. These innovations in military technology made knights and castles seem less reliable. The war promoted feelings of pride and nationalism, the system shifted towards the people and loyalty to monarchs rather than to nobility.
In essence Feudal society as a whole fell due to advancements in technology and agriculture; and the effects of the bubonic plague.
Answer:
The United States Strategic Defense initiative nicknamed “Star Wars” had the goal of building up the nation’s defenses against a Russia’s missile attack.
The Strategic Defense Initiative or SDI had the aim of developing a potent defense strategy to build up the United States defense in case of a possible nuclear attack from the Soviet Union. President Ronald Reagan was the one who created the idea because he wanted to protect the United States in the remote case of an intercontinental ballistic missiles attack. Part of the defensive system would be located in space.