Military expansion. The Rashidun Caliphate expanded gradually; within the span of 24 years of conquest, a vast territory was conquered comprising Mesopotamia, the Levant, parts of Anatolia, and most of the Sasanian Empire. Unlike the Sasanian Persians, the Byzantines, after losing Syria, retreated back to Anatolia.
1 And the nature of this reality again can neither be consistently represented as a fixed and hard substance nor as an unalterable something, but only as a fixed order of recurrence of continually changing events or impressions.
Clarity is defined as clearness of thought or style, and the way to write with clarity, again, is to pay attention to the sentence, one at a time. Wordiness does not mean too many words, as in exceeding word count limitations imposed by teachers; instead, it means unneeded words within a given sentence.