"Be fruitful and multiply and fill the earth" Genesis 1:28
Well, if you add every human being who once lived on the planet and compare this number with the number of people living right now on the planet, you see we are more numerous right now!
Amazing?
Actually, it is quite natural, every generation of human has “always” been more numerous than the previous one. Our population grows exponentially (green line).
The number of human beings has soared (rocketed) since 1800 as you can see on the graph below.
graph from http://www.worldometers.info/world-population/
Have a close look at this graph, you can see that very soon the population growth is going to slow down... Actually, the human population is going to be at its maximum in the next decade or so... It means that you and I are going to be around when this happens!