how did the industrial revolution and the rise of capitalism spark interest in africa and the imperialism of the 19th and 20th century?

after great Britain became industrialized, other European countries followed. this created competition between nations and these countries needed more land and resources, the new inventions that came out from the industrial revolution like the steam engine and vaccines made it possible for Europeans to finally enter and imperialize Africa. the reason that Europeans wanted to imperialize Africa was there need of land and Africa has natural resources like diamonds, they also wanted to spread there way of living and it was the "white mans burden" to make Africa better by changing there way of life.