Becasue people know it is right and will someday rule the world..
Nothing in Islam rules this.
Yes, it is a basic rule in Islam.
20% of the world is Islam
Dar al Islam - Domain of Islam, land currently under Islamic rule Dar al Harb - Domain of War, land currently not under Islamic rule
Islam is the second largest religion in the world.
No Islamic leader was forced to convert to Islam. It is a basic and explicit rule in Islam; per Quran; that no compulsion in religion.
Suicide or any other type of purposeful death is FORBIDDEN in Islam and highly condemned. Therefore there is no "rule" that states about preparation before death.
Islam is not the smallest it is the largest religion in the world.
The territory under Muslim rule expanded rapidly
No rule per religion
Islam