Your point is a very valid one and I think that you do a good job of supporting it. I think that we, as Americans, like to have heroic figures and that we neglect the contributions of other individuals as a result. We don't always see the forest for the trees.
Personally, I don't think that Martin Luther King, Jr. Day should be a holiday. Now before you accuse me of being racist, hear me out. Martin Luther King Day is the only holiday we have in the United States that honors only one person. There is Columbus Day, but that has fallen out of favor in recent years and is in grave danger of losing its status as an observance altogether. Presidents' Day honors both Washington and Lincoln--two celebrated American heroes who had a great impact on our nation. Martin Luther King Junior was a great man and was a leader in the Civil Rights movement, but there were many other leaders, lots of people played significant roles in the Civil Rights movement. Take Thurgood Marshall as one example . . . not only was he the first African American to serve on the Supreme Court, but he successfully argued Brown v. the Board of Education prior to his appointment. Marshall worked closely with the NAACP as their lead lawyer. It was because of President Lyndon Johnson's influence that the Civil Rights Act and the Voting Rights Act were passed--an agenda that was planned by the Kennedy brothers. You really cannot discount their role in the Civil Rights movement either.
And then there are the Civil Rights leaders who paved the way . . . Frederick Douglass, Harriet Tubman, W.E.B. DuBois, Booker T. Washington, Harriet Beecher Stowe, and President Lincoln. And the people who fought for other kinds of Civil Rights . . . Caesar Chavez, Susan B. Anthony, Margaret Sanger, Anne Hutchinson.
We should not have a Martin Luther King Day. We should have a Civil Rights Day. A holiday that is more inclusive. A holiday that celebrates all of the gains we have made. A holiday that recognizes that we still have a ways to go toward achieving equality in our nation. By recognizing only one man, we discount he contributions of others.
Man, can I get off on a tangent or what? Sorry about that.
You have some grammar issues with this essay. There are places where your verbs don't agree and other places where you have used the wrong word or left out an article.
I'll pick out the first five that jump out at me:
Remarkable figures, which were often characterized as bravery, intelligence or persistence,
Remarkable figures, who were characterized by bravery.
OR Remarkable figures, who were characterized as brave, intelligent or persistent . . .
Figures is the word here that everything else has to agree with.
their profound influence owned much to their ability
owed much to their ability
they were not gods or supernatural but simply a human being
simply human beings.
Thinking back to American Revolution
the American Revolution
he is worth these praise for his great deeds
he is worthy of this praise
OR he is worthy of these praises for . . .