This is an amazing piece of work. The world at large should really appreciate all 3 countries that we know according to history made science and technology what it is today; special hails to Egypt, Greece and Rome.

Although, as you mentioned in the conclusion; some other countries might have really contributed a great deal but unfortunately did not keep their records.

It's really hard to say who the fathers of modern engineering are? That would be an endless debate. They all contributed their parts, there was imitation and all. But it's good that the debate continues, because it's only out of the struggle for originality can we understand more hidden truths on the topic.

Thanks a lot for sharing. I enjoyed reading through!!!