Islam IS the true religion of humanity.

[feeling]

Can you give me examples for this conquered countries which was advanced in science , together their inventions and discoveries . I want to learn .

Syria, Byzantine, Egypt(pretty damn advanced to the time if you ask me),Italy, the remains of the Alexandria library(biggest library in the world at the time) was destroyed under orders of Caliph Omar who stated “If those books are in agreement with the Quran, we have no need of them; and if these are opposed to the Quran, destroy them.”
Source
http://www.roger-pearse.com/weblog/2010/...lexandria/

Also I found only one muslim scientist who contributed to islamic golden age but his religion is under question and there are still disputes. Those 2 who made biggest contributions however are Omar Khayyám and Muḥammad ibn Mūsā al-Khwārizmī first being agnostic hedonist and latter being adherent of the Zoroastarianism.

As for making somebody muslim by force it means taking away privelages from non muslims while giving privelages to the muslims or inducing sanctions on non muslims.