Leonardo's ability to observe and study, then demonstrate those things in his art, he was pretty much the definition of a Renaissance man. Defined: Renaissance man: a person with many talents or areas of knowledge.
Answer: Leonardo´s versatility is the best example of what we usually call "renaissance man". He excelled in many areas and did so well that he is frequently considered genius.
Explanation: There were other people like Leonardo, but Leonardo continues being famous. Versatility and genius where theory/experiment and practice meet, where fantasy/imagination and praxis and utility meet is the best reflexion of that time (renaissance). Psychologically speaking renaissance is considered a period or re-awakening, extroversion. People like Pico della Mirandola or Paracelsus still fascinate us.
Radical Republicans wanted to punish the South for starting the war. They also wanted to be sure new governments in the southern states would support the Republican Party. I'm Frank Oliver. Today, Doug Johnson and I tell about this reconstruction.