Extreme dry conditions contributed to the decline of the ancient South Arabian kingdom of Himyar... the droughts left behind a region in disarray, thereby creating the conditions on the Arabian peninsula that made possible the spread of the newly emerging religion of Islam.On the plateaus of Yemen, traces of the Himyarite Kingdom can still be found today: terraced fields and dams formed part of a particularly sophisticated irrigation system, transforming the semi-desert into fertile fields. Himyar was an established part of South Arabia for several centuries.However, despite its former strength, during the sixth century AD the kingdom entered into a...