Several factors have contributed to the growth of Muslim population in India-invading armies with their retinues, constant recruitment of soldiers from across the borders, red-carpet welcome extended to immigrants from Muslim countries, forcible conversions, proselytization by means of pressures and temptations, large-scale polygamy with Hindu women, and the proverbial Muslim fecundity enjoined by express statements of the Prophet who wanted his flock 'to be more numerous than any other people'. Dr. K.S. Lal has documented in some fulness how the continued wars of conquest waged by the Islamic invaders ensured a constant supply of Hindu prisoners of war who were sold and resold as slaves and who eventually ended up by feeding the Muslim population. It may sound cruel but the Theology of Islam does prescribe capture and enslavement of non-combatant men, women and children of the infidels as a part of the legitimate booty promised by Allah to those who fight for enforcing his commandments. The history of Islam is replete with this practice. On the other hand, Dr. Lal examines in some detail and refutes conclusively the oft-repeated theory that the Hindu caste system was responsible for conversions to Islam. He points out that the countries in the Middle East, Central Asia and North Africa had no caste system and yet they succumbed completely to the onslaught of Islam.