Easing of Cold War tension
Nixon Doctrine included attempts at opening talks with Communist countries to ease the tension of the Cold War.
Nixon's policies led to the opening of China and the beginning of trade agreements with the country. He also was the first president to visit the USSR. He is also responsible for the Paris Peace Accords in Vietnam and the removal of American troops. His policies could be argued as the first steps to ending the Cold War.
The correct answer to this open question is the following.
As every single presidential term in the United States, Jimmy Carter had his ups and downs, positives and negatives.
Among the positive things, Carter opposed racial segregation, supported civil rights movements, established the Department of Education and the Department of Energy, supported legislation to conserve energy in the country, played a key role in the Camp David Accords to establish peace in the Middle East, and supported the signing of SALT II, as well as to give the operation of the Panama Canal to Panama´s government.
On the negative side, one of his first decisions that resulted controversially was to pardon the draft evaders of the Vietnam War. A decision that was questioned by many. He found it difficult to deal with stagflation, high unemployment rates, limited economic growth, he had to deal with the energy crisis at the end of his presidency, and also with the Iran hostage crisis. And one of the tensest moments, the Soviet Union invasion of Afghanistan.
Leonardo da Vinci (1452-1519) is considered the worlds greatest genius or the ultimate Renaissance man (someone good at everything). He was an Artist, Inventor, and Scientist whose famous works range from the Monalisa, The Last Supper, and the Vitruvian during the Italian Renaissance. Leonardo made an immense contribution to the study of medicine, science, and art with a voice of reason, logic, and science in a world of superstitions.
Contributions to art
He excelled in drawing, painting, and sculpture, the Monalisa and The last super are among his most famous.
Inventor and Scientist
Leonardo's journal was filled with over 13000 pages of how he observed the world and drew pictures and designs of helicopters, war machines, musical instruments, and hang gliders.
He studied the human body and drew muscles, tendons and the human skeleton. He also had detailed pictures o the heart, arm and other organs.
Secondary; The events are 100 years apart. There is virtually no chance of it being primary.
