The Second Wave of European Colonial Expansion and Imperialism

Describe the social, economic and political factors that led to the second wave of European colonial expansion.   How did the rise of imperialism in the post modern era, lead to the  growth of major European empires. More specifically, how did the rise of  these Colonial empires address the social concerns Europe was facing in  the aftermath of the Industrial Revolution? Finally, how did imperial rule impact life for colonized people?  

Your response should specifically address:

1. The socioeconomic landscape of European post Industrial Revolution.
2. How did Darwin's theory of natural selection impact the motive and justification of European imperialism after 1859? 
3. Describe the racial justification for European colonization.