Herding among the Bedouin was common until the late 1950s, when it effectively ended during a severe drought from 1958 to 1961. Due to the drought, many Bedouin were forced to give up herding for standard jobs. Another factor was the formal annulling of the Bedouin tribes' legal status in Syrian law in 1958, along with attempts of the ruling Ba'ath Party regime to wipe out tribalism. Preferences for customary law ('urf) in contrast to state law (qanun) have been informally acknowledged and tolerated by the state in order to avoid having its authority tested in the tribal territories. In 1982 the al-Assad family turned to the Bedouin tribe leaders for assistance during the Muslim Brotherhood uprising against al-Assad government (see 1982 Hama massacre). The Bedouin sheikhs' decision to support Hafez al-Assad led to a change in attitude on the part of the government that permitted the Bedouin leadership to manage and transform critical state development efforts supporting their own status, customs and leadership.