Explain the true meaning of the phrase: “human capital is the real wealth of this country, before and after oil’.

The true meaning of the phrase is that the humans are the ones that control and produce everything, and that without them, there's not a single things that can manage that. In this case we have the oil, as it is one of the most demanded resources, and one that makes enormous profit, but the oil can not extract itself, can not manufacture itself, and it can not use itself. For all those things, human action and brain power is needed, and the same goes for all the other things that make capital, as without the human capital, none of the other capitals would exist.

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.

answer; approx,300,000 ;