How did islamic caliphates to gain, consolidate, and maintain power?

I do not know if this is fully correct, but this is what I have

Islamic Caliphates after the death of. Muhammad followed the example he started when dealing with non-Muslims in their empires. Non-Muslims were allowed to practice their religions and follow their religious laws as long as they paid a yearly tax called the jizyah, sometimes referred to as kharāj (though the two were sometimes different taxes), the poll tax, or the land tax.

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.