Why did spain colonize florida and the rio grande valley? question 5 options: the spanish found silver and gold mines there. spain wanted to protect its colony in mexico from other europeans. native americans in that region wanted to trade with the spanish. missionaries insisted on spreading christianity across the continent.

one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.

porter is writing economic history because he is focusing on the cost of developing vaccines.