The aim of this research paper is to identify the history of the reign of Prince Bader bin Hasnawayh bin Hussein al-Barzikani (369-405AH/979-1014AD) from the political and civilizational perspective. This era is considered one of the most prosperous and advanced periods of the rule of the Hasnawayh Emirate, wwhere the Prince assumed the rule of the emirate after his father’s death, Prince Hasnawayh bin Hussein al-Barzikani (369 AH / 979 AD). Prince Bader was able to tighten his complete control over the western region of the mountains by the assistance of the Buyid prince Adud al-Dawla bin Rukn al-Dawla, succeeding to control the affairs of the Hasnawayh Emirate, establishing security and stability, and striking the hands of the troublemakers. This study is concerned with explaining the history of the Hasanawi Emirate during the reign of Prince Badr bin Hasanawi and his role at the level of internal and external relations, and the nature of his relationship with the Buyid princes, which was characterized by ebb and flow. It reached the peak of its prosperity and political and civilizational development, so some called him the Prince of Mountains because, according to the praise and testimony of historians, he was brave and had sound opinions and was experienced, especially in the political, economic and financial aspects. His economic policy had positive results and his coffers became overflowing with money, leading the emirate to become competitive with the rule of the Buyids during that period, while the Buyids were suffering from economic crises due to the preoccupation of its princes with a life of extravagance and luxury. Therefore, they often relied on Prince Bader's assistance with money, saving them from economic crises and problems. This was all due to the shrewdness and wise policy followed by Prince Bader bin Hasanawi in order to preserve the interest and strength of his emirate's rule at the expense of the Buyids.

The time of the crusades is considered a communication phase between Muslims and Christians at times of war and peace because the human nature bouod them to fight sometime and make a truce other times where at peace time there was a civilization communication between them widely. It is observed the extent of the development of the Islamic civilization on the super interest of the services which help create the trade exchange in terms of facilities, columns and allot categories of people for the trade services and customs exemptions in addition to the bank services and mint various currencies . They were the most important factories which imposed both parties ( Islamis and Christian ) in Levantine Countries to acquire a big degree of importance for the life of both parties in spite of the military confrontation between them, it is doubtless to say those factories helped a lot at least made the war people busy about their war and the trade people busy about their trade. In this research we talked about trade during the crusades where it is indicated to the contact methods between the above parties in addition to the commercial commoudities exchandises and the trade ways through which the merchandises are delivered between the both sides.

Acts of thieves and acts of banditry are considered the dirtiest acts deprived by God. As mentioned in the Holy Quran “as for the man or woman who is guilty of theft, recompense them by cutting off their hands for their crimes. that is the punishment from Allah. Allah is mighty, wise. (38)”. These acts affected the economy and trade of the cities as well as stealing the commercial caravans and pilgrim’s caravans which affected Muslims’ interests in such area Because of such acts, importing and exporting of goods became more difficult to and from such areas. Moreover, taxes gained from trade were also affected by such acts. Since these theft acts affected the trade and economy of Islamic states in a bad way, Islamic states should have been ready to fight these thieves to secure commercial routes.The acts of thieves were more active during the weakness of the Abbasid state. Thieves usually make use of political circumstances to conduct their criminal acts. On the contrary, when the states are strong, they cannot conduct their criminal acts.