Caliphs brought Islam to India
Thomas Jefferson, when writing the Declaration of Independence of the US used a fundamental Judeo-Christian concept. At the Declaration, Jefferson states that: "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable rights, that among these are life, liberty and the pursuit of happiness...".
The Judeo-Christian concept of God-given rights (for example: every man is created equal; rights over life and liberty...) is a fundamental concept used by Thomas Jefferson as the core of the Declaration of Independence.
Spanish conquering Mexico
Effect: Death of 2 continents. Deconstruction of thriving civilisations. 2 brand new continents for Europeans to put to use.
Cause: The Spaniards wondering if the Earth is actually round. During the journey the stumble upon the New World. Another cause is the greed and disrespect of the Spanish colonizers. The American natives were seen as primitive and savage, which the Spanish saw as a reason/excuse for killing their cities, people and culture.
Because it was near rivers and other geographical advantages.