if it had not existed a lot of technical, mechanical, dietary and cultural breakthroughs may not have happened I am not sure about this. If Einstein didn't com

if it had not existed a lot of technical, mechanical, dietary and cultural breakthroughs may not have happened I am not sure about this. If Einstein didn't come up with theory of relativity or Newton hadn't come up with gravity, someone else would have, isn't it? Humans are curious creatures. Inventions/progress are bound to happen, the timeline might be different.