According to the Constitution, unalienable rights can never be taken away from the people or denied. A fine example is the Declaration of Independence, where we the people have the rights to life, liberty and the pursuit of happiness.<span />
South Carolina wanted to keep their slaves and with Lincoln winning the election they felt their rights to have slaves were threatened so they seceded causing the civil war.
The U.S refused to recognize the Philippines independence.
Most cause were in the U.S governments quest for an overseas empire of the Filipino people for freedom.