There should be no interference with slavery in the states in which it already existed... not sure if correct .
Answer:
A social contract is an agreement between people in a society to cooperate for social benefits, such as giving up their freedoms for protection. So the answer would be "A social contract is based on the belief that people must be willing to give up some of their freedoms to maintain order"
Explanation:
To deduct why they need laws
About 11 to 20 out of every 100 veterans (or between 11 and 20%) who served in operations Iraqi Freedom and Enduring Freedom have PTSD in a given year.
About 12 out of every 100 Gulf War Veterans (or 12%) have PTSD in a given year.
About 15 out of every 100 Vietnam veterans (15%) were currently diagnosed with PTSD when the most recent study of them (the National Vietnam Veteran Readjustment Study) was conducted in the late 1980s. It’s believed that 30% of Vietnam veterans have had PTSD in their lifetime.
There isn't a exact percentage for all the veterans in the US but i hope this helps!