Why do we always have the greek, roman or chinese source about the persians? Where are their writings about other peoples or events? I understand something like Carthage we have few natuve sources bcause of the wars that annihlated them, but the persians never faced such thing.
Well we do have some internal Persian sources; let me know what time period you're interested in and I can suggest some reading.
I understand something like Carthage we have few natuve sources bcause of the wars that annihlated them, but the persians never faced such thing.
That is exactly what Persians have faced. Iranian Plateau was perhaps the most geopolitically critical area in the ancient world, and most generals of ambition has tried to capture it. see This
For a ballpark estimate, Iran was annihilated once every three centuries, and these Invaders were usually of intolerant, book-burning type. For a century after Alexander the great conquered Persia and burned Persepolis, the Hellenistic Seleucids ruled over Iran, and judging by the architecture Iranians became more Hellenistic than Greeks. Or after Omar conquered Iran, Caliphates deemed every expression of non-muslim art and writing unclean and destruction material, and Iranians become more Muslim than Arabs. Mongols did two Ilghars (a kill and burn as you go kind of expedition) all over Iranian Plateau within one century. Portuguese, Russians (Czarin and Soviet) , Brits, and Ottoman Empire all have invaded this dry lands since.
Meanwhile, as you know, Persia is the birthplace of Arabian nights stories, in which a beggar becomes a king overnight. all throughout history, each new king has tried to destroy the glory of his predecessors. that was normal in the ancient world with the exception that there were too many new Kings (Shahs) in Persian History. At one point after the fall of Safavid Dynasty, over three hundred men declared Kingship at the same time.
With all that said, the written documents have not survived. Instead we have a mythic, father-to-son, bard type of history well reserved for poetry. The most reverend books of this kind are Shahname and Panj Ganj
edit: spelling
This came up in a response to another poster's question. You may find it illuminating: http://www.worldcat.org/title/persian-empire-a-corpus-of-sources-from-the-achaemenid-period-volume-2/oclc/516900336?ht=edition&referer=br.