Possibly, since the growth was exponential. For example, twice as many people leaved in 2000 as in 1900, 1800, 1700 combined:


Year  Population  
1700  600,000,000  
1800  900,000,000  
1900  1,500,000,000  
2000  6,000,000,000  

Possibly, since the growth was exponential. For example, twice as many people leaved in 2000 as in 1900, 1800, 1700 combined:These figures only give the population at two instants in one century rather than the number of people born, but for rough purposes they are usable. Take the last century, add the start and end together (since at least that many people lived in the century) and you get 7,500,000,000. Take the previous century, do the same, and you get 2,400,000,000. Add the previous, and you get another 1,500,000,000. In total you have at least 11,400,000,000 alive in the last three centuries, of which ~65% were alive in the last one. Obviously as you add in the remaining centuries the figure drops below that. I would guess to slightly above 50%, but of course it is a guess.
This neglects one crucial variable though, where the population grown this century has been. If the population growth has largely been in Christian lands, the 65% figure is possible. However, most of the growth isn’t in Christian lands, a fact that our western love of abortion and contraception almost makes intuitive:
World population is now growing by 1.3 per cent, or 77 million people per year. Six countries account for half of this growth: India (with 21 per cent of the total increase), China, Pakistan, Nigeria, Bangladesh and Indonesia.In other words, while there is a good argument that about 50% of the world’s population has lived in this last century, so far as I can see there is not a good argument that the same is true for the world’s Christian population.
patent +AMDG