Knowledge of pre-Islamic Arabia rests mainly on original archaeological and data from the region itself. Countless pre-Islamic sites are scattered over the whole Arabian Peninsula: ancient lines of circles of raised stones, cairns, graveyards, and so on. In addition there are more recent constructions such as fortified towns and ruins of temples and irrigation systems.
One of the most important concepts in Islamic theology is that the message of Islam is of universal significance for mankind. This principle is inherent in a number of Muslim doctrines and grows directly out of the revelations of the prophet Muhammad. According to Muslim theology, whereas all prophets previous to Muhammad had been sent to only one people, the message revealed to Muhammad in the Qur’an is a message for every nation on earth.