The following data/observations provide food for thought concerning the trend of disproportionate increase in Muslim population around the world on one hand and likely further decline in the level of its standard of living and literacy on the other. The data which covers all other major religions in the world shows increases in the proportions of the world population adhering to the two major proselytizing religions, Islam and Christianity, over eighty years (1900-1980). Western Christians were estimated at 26.9 percent of the world's population in 1900 and 30 percent in 1980. Muslims increased more dramatically from 12.4 percent in 1900 to 16.5 percent in 1980. Christianity spreads primarily by conversion, Islam by conversion and reproduction. The percentage of Christians in the world peaked at about 30 percent in 1980, leveled off, and is now declining. It probably will be approximately 25 percent of the world population by 2025. As a result of their extremely high rates of population growth, the proportion of Muslims in the world will continue to increase dramatically, probably accounting for about 30 percent of the world's population by 2025. -M. A. BHURA, Karachi, via e-mail, May 20.