This article was written by Alex Hollings and originally published on Sandboxx.

Kelly Johnson wasn’t the first man to build an airplane. Nor was he the first to push the limits of what an airplane could do. But few men have played a more vital role than Johnson in shaping mankind’s ascent into the skies.

According to the latest expert estimates, human beings like you and me, have been walking on earth for over 200,000 years. That figure gets even tougher to wrap your head around when you consider that a mere 200 years ago, mankind had yet to develop matches or typewriters. A century ago, we didn’t have antibiotics or movies with sound. These, along with countless other advancements, played a roll in a technological revolution that continues to this day, like a snowball rolling downhill, enveloping everything in its path.

Of course, mankind didn’t come by these incredible advancements by accident (most often, anyway). Behind each groundbreaking technology is a man or woman, dedicated to solving the problems of their day, and to getting out in front of those coming tomorrow. Nowhere is this human-driven rapid advancement of technology more prevalent than in one of our species’ most recent civilization-altering breakthroughs: aviation.

In 1903, the Wright Brothers first took flight in Kitty Hawk. Less than 40 years later, the first B-29 took to the skies with a pressurized cabin and a wingspan that stretched further than the length of Orville Wright’s entire first flight. A mere 19 years after that, Yuri Gagarin flew in space.

There’s no doubt that countless hands, hearts, and minds played vital roles in our rapid progression from the steam engine to the SpaceX Starship. But even amid this sea of engineers and aviation pioneers, some names stick out. Because while millions may have helped mankind reach the sky, some men’s contributions stand head and shoulders above the rest. Kelly Johnson was such a man.

Forged in the fires of World War II

Clarence Leonard “Kelly” Johnson was born in 1910, seven years after the Wright Brothers changed the world in Kitty Hawk. The son of Swedish immigrants, Johnson would win his first prize for aircraft design at the age of 13. By the time he was 22 years old, he was working as an engineer at the legendary aviation firm Lockheed.

At 28, Kelly Johnson’s role at Lockheed would bring him to London. At the time, Britain was preparing for the onslaught of Nazi Luftwaffe fighters and bombers that were to come just three years later in the Battle of Britain. The British were unconvinced that such a young man could produce an aircraft that could turn the tides of an air war, but the fruit of Kelly Johnson’s labor, dubbed the P-38 Lightning, would go on to become one of the most iconic airframes of the entire war.