At the beginning let’s answer the question:
“WHAT IS THE MOST IMPORTANT SCIENCE?”
It depends who you would ask the question. When I was 18 years old and people asked me “why I’m so into music?” I was answering: “what else can be more important than music?”
Students of UK thinking history, psychology and literature is more important than physics.
Try to ask the questions a chemist there’s a high chance he would say chemistry is the most important.
And there’s can be quite a reasonable way to say all sciences do equally matter.
https://www.quora.com/Which-is-the-most-important-science-chemistry-physics-or-biology
So my answer (as well as another answers) is quite controversial but I think physics is the most important… or at least it’s one of the most important sciences.
That’s why teaching of physics is the most (or one of the most) important things to do in education.
And the earlier children would start to understand basic physics concepts – the better. That’s why it is so important to come up with the most simple explanations of the most important concepts.
WHY THE SPEED OF LIGHT?
The concept of the speed of light is in the basement of the theory of relativity. And there’s nothing more important in the contemporary physics than the theory of relativity.
So the most simple explanation of the speed of light is the most important thing to do….
considering not only physicists should know the concept but chemists, mathematicians and philosophers also should know it.
HOW MUCH OF A VALUE ADDED TO HUMANITY?
If it’s needed to explain the speed of light to a 1 million of students and my explanation would save $1 at each case – it would be $1 million dollars of added value.
If we apply the calculation to a 1 billion students it’s gonna be 1 billion dollars of added value.
So the most humble estimation of my invention is 1 million dollars of added value to humanity.
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Alec school 