@Josephyala
My favorite historical figure is Michael Faraday. He is the real father of electricity. Michael Faraday FRS was an English scientist who participated in the probe of electromagnetism and electrochemistry.

His main findings encompass the underlying precepts of electromagnetic induction, diamagnetism, and electrolysis.

Today, we can not do a lot of things without electricity. This is how beautifully Michael Faraday has contributed to our world today.

In response to the second question, it is okay to judge the past from the present. Judging the past from the present helps in making constructive critiques.