Why is zakat the most important pillar of islam?

Zakat is when the Muslim gives money to charity. Allah blesses them with the means to help others. Usually the most important pillar of Islam is prayer but giving Zakat gives the Muslim good deeds and shows Allah that they are grateful for their blessings.

its kind of blury sorry

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.