Meriwether Lewis and William Clark helped open the American frontier to settlement by exploring the regions further out west. They mapped these territories and found accessible routes, so that Americans could move further out west and settle the land before the Europeans could claim it. There was also a smaller objective of studying the science and possible economic qualities.
By culture and just the life style they lived . I’m not really sure to be exact but yea
Of course it has, many third world countries require modern technology to grow and flourish. Before the industrial revolution in the United States, many people worked extremely hard to make clothes and create armory but after the revolution, the impact was huge sewing machines came into work, interchangeable parts and etc. we now use technology that we have to help countries that are still developing.