Answer:
we hold yhese truth be self-evidient , that all men are created equal , that they are endowed by their creator with certain unalienable rights ..
Of course Islam encourages and supports the development and creativity if you read the holy Quran you will see a lot of verses that we must think to understand the world around us. The miracle of the Quran was in the science that it introduces. Every day we saw and understand the miracles in the Quran. Islam is the religion of science and we know that the muslim who offers what serves humanity not only muslims will has the greatest reward from Allah. The problem not in Islam it's in the modern muslims.
A. The US made the Gadsden Purchase.
The US never sold Texas. US won the war. Mexican cession was the US taking land.
First and Last one
They did believe their culture was superior, that's obvious. During this they also got lots of benefits from the colonies.