They failed because nobody cared about the railroad. The railroad had to be a government project with leases to companies but the government was too much involved in the slavery issue that it didn't have time to deal with railroads. That's why railroads boomed after the civil war ended.
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<span>According to Martin Gilbert, one effect of President Franklin D. Roosevelt’s policies on industry was that production of many goods such as steel went up a lot. </span>
Answer: changes during the Neolithic Revolution
Explanation: 4
