It means to not only think of your own interest but also to the interest of others.
The main reason why the Catholic Church was committed to defending the literal meaning of the Bible passages is because they feared that people would stray from the church if they started to develop their own, different interpretations of the Bible.
The Catholic Church caused a lot of complaints but also helped Europe grow together and not have wars over what religion to follow.
There were several immediate stated causes for the U.S. declaration of war: first, a series of trade restrictions, Orders in Council (1807), introduced by Britain to impede American trade with France, a country with which Britain was at war (the U.S. contested these restrictions as illegal under international law); second, the impressment (forced recruitment) of U.S. citizens into the Royal Navy; third, the British military support for American Indians who were offering armed resistance to the expansion of the American frontier to the Northwest. President James Madison and Congress declared what is sometimes referred to as the 2nd War of Independence, the War of 1812.
