The Industrial Revolution demonstrates the idea of economies of scale. According to this principle, increased production of goods improves overall efficiency. For peasants, the large-scale production of goods such as crops meant fewer opportunities. Conditions further worsened due to the enclosure movemen.
Texans thought that life and property were safer within the United States than in an independent Texas. Texas was also in debt and the militia wasn't as great.
Look up all four of them. Scramble of Africa talks about European Powers trying to Colonize Africa which fits your question. Let me know if you need more info. Have a nice day. :)