Karl Marx promoted the idea or the principle that by
pursuing your own self – interest in a free market, you would actually be
working for the common good. This principle is self – centered which means you
need to start with your self interest in order that the common good of the
society will be achieved.
The war giving Cuba independence from Spain was the "Spanish American War", since this was the war in which the US engaged with Spain in part because of their ill treatment towards the Cuban natives.