One advantage of the scientific method over other ways of understanding the world is

A usual was we see people understand the world is through intuition and authority of other people instead of using scientific methods.
Major advantages of understanding the world through scientific method include, acquiring the first hand knowledge which will be on factual basis instead of biased information included. The data will clear the issue as it actually is instead of deriving commemorative explanations for mere facts.

well the unjest treatment and discrimination did get faced by the idians and soldiers

explanation:

the declaration states, “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….”