The book that brought to light the abuses in the united states meatpacking industry in the early 20th century is the Upton Sinclair’s the jungle book. The book jungle is written in 1906 by Upton Sinclair which is an american journalist and novelist. Sinclair composed the novel to describe the exacting circumstances and demoralized lives of settlers in the united states in Chicago and alike developed cities. On the other hand, most readers were more apprehensive with his revelation of health violations and unsanitary activities in the american meatpacking industry throughout the early 20th century importantly donating to a public outcry which ran to improvements as well as the meat inspection act. 
        
             
        
        
        
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For a war if I'm right. I think that was the beginning of the American Civil War. I could be wrong though.
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It was due to the fact that many children would die or get seriously injured working in harsh environments.
 
        
             
        
        
        
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Fort Sumter in Charleston, South Carolina was one of the four forts that had not yet been captured by the Confederates, so Lincoln wanted to keep the fort at all costs in order to keep the Union's strenght in the South. He sent unarmed ships to supply the fort with military and food supplies. The Confederate President Jefferson Davis gave command to Southern forces led by General Beauregard to bomb the fort on April 12 to force it to surrender, which happened. 
The Northern states all supported Lincoln. He called for the fortresses to be reclaimed and the Union to be preserved. At the same time, 75,000 volunteers were called up for a period of 90 days. In the previous months, several governors had trained their militias. Their troops started to move the next day. 
 
        
             
        
        
        
Believe it might be D) The believed in social contract theory