You might find this section of the FAQ helpful:

Why is Africa "less developed"?

Additionally, I would like to direct your attention to these answers:

Why did European powers, in particular, start dominating and developing at a rate which other powers of the time (Ottoman Empire, Ming Dynasty in China, Saffavids in Persia and the Moghul Empire in India) could barely keep up with?

The native americans and several other cultures did not experience the same technological advancements as europe. What has caused this diffrence?