It started out I was looking for log splitters and ... well .... my interest just ... um .... GREW
There's some machines out there that could eliminate an entire race of people.
LeTourneau's story is inspiring. He wrote a book called "Mover of Men and Mountains". His machines were developed at the same time of Caterpillar's, and it is arguable (iirc) that his bulldozer was the first. The university he started is going stronger than ever.