How did inventor Nikola Tesla change our world?

Nikola Tesla, a trained electrical and mechanical engineer, was one of the most influential inventors of the 20th century. Eventually holding over 700 patents, Tesla worked in a number of fields, including electricity, robotics, radar, and wireless transmission of energy. Tesla's discoveries laid the bedrock for many of the 20th century's technological advances.

Dates: July 10, 1856 - January 7, 1943

Also Known As: Father of AC Current, Father of the Radio, The Man Who Invented the 20th Century

Overview of Tesla
Tesla’s life played out like a science fiction movie. He frequently had flashes of light in his mind that revealed the designs of innovative machinery, which he committed to paper, constructed, tested, and perfected. Although all was not easy. The race to light up the world was fraught with rancor and animosity.

Growing Up
Tesla was biologically the son of a Serbian Orthodox priest in Smiljan, Croatia. He credited his innovative quest to his mother, an innovative homemaker who created appliances such as a mechanical eggbeater to help with the home and farm.
Tesla studied at the Realschule in Karlstadt, University of Prague, and the Polytechnic Institute in Graz, Austria, where he studied mechanical and electrical engineering.

Tesla Works With Edison
In 1882, 24-year-old Tesla was working for the Central Telephone Exchange in Budapest when the idea for a rotating magnetic field cut through his mind.

Tesla very determined to turn his idea into a reality but he was unable to find support for the project in Budapest; thus, Tesla relocated to New York in 1884 and introduced himself to Thomas Edison through a letter of recommendation.

Edison, the creator of the incandescent light bulb and the world’s first electric lighting system in the commercial blocks of lower Manhattan, hired Tesla at $14 per week plus a $50,000 bonus if Tesla could improve Edison’s electric lighting system.
Thomas Edison's system, a coal-burning electric generating station, was limited to supplying electricity to about one mile radius per time.

The Big Dispute: DC vs. AC Current
Although Tesla and Edison shared a mutual respect for each other, at least at first, Tesla challenged Edison’s claim that current could only flow in one direction (DC, direct current). Tesla claimed that energy was cyclic and could change direction (AC, alternating current), which would increase voltage levels across greater distances than Edison had pioneered.

Since Edison wasn't happy about Tesla's idea of alternating current, which would compel a radical departure from his own system, Edison refused to award Tesla the bonus. Edison said the offer of a bonus was actually a joke and that Tesla didn't understand American humor.
Betrayed and insulted, Tesla quit working for Thomas Edison.

Trust this was enlightening!

To be continued.....

Kindly stay tuned as we further explore;

--Tesla the Scientific Rival
--Winning the "War of Currents
--The Death of an Amazing Inventor
--Missing Papers
--Father of the Radio

Reference: https://www.thoughtco.com/nikola-tesla-1779840