The correct answer to this open question is the following.
Te question does not mention any individual in specific, so we assume that we choose the individual we like to write the testimonial.
We choose Dr. Martin Luther King Jr. He was an important figure and led the civil rights movement in the United States. He followed the ideals of liberty and tolerance and influenced millions of people. On his positive side, Dr. King could congregate thousands of people to the civil rights movement cause. He set the example. He was at the very front of the protests and marches. One very good thing he had was that he supported peaceful demonstrations, never violent protests. His "Letter From the Birmingham Jail" and "I Haad a Dream" speech, have influenced modern leaders around the world.
On the negative side, probably he could have been more open and tolerant to negotiate with authorities or to join forces with other black leaders such as Malcolm X, that although he used violence in his protests, the union of more African American leaders could have taken the movement to different dimensions and accomplishments.
