tomboytoy said:
I dunno, how do you think people protected themselves for thousands of years before modern birth control?
The simple answer is, they didn't.
Average number of children per woman was MUCH higher throughout all of history until this past century. With the advent of larger modern cities it started going down a bit. But it really wasn't until the creation of the birth control pill that the number went down significantly. Overall world wide average did take time to go down afterwards simply due to spreading the pill to other countries and waiting for their government, religious and social norms to accept it as a good thing to use. But historically speaking prior to the 1900's women simply got pregnant a lot more than today's society.
Around 1800 the average number of children per woman was a little higher than 6 with only a life expectancy of 30 years of age. (Every country, not just ours) This did NOT include children who did not live to birth. And keep in mind with the higher risk of childbirth back then many more woman simply died during child birth. So that average would be higher if only women who lived to old age were counted.
Today the average number of children hovers around the 2 mark and our life expectancy has increased drastically. Further evidence for the efficacy of the birth control pill is the fact that really the only area on earth where the number of births is still at the high mark is the Sub-Saharan area of African continent where most women simply don't have access to the pill. Yet they have the oldest ancestry of all humans. In all that time they've never developed natural methods that seemed to have worked. Niger is the highest today with an average of 7.57 children per woman.
There's many sites that list historical birth rates but this one has a nice graphical animation. Simply press play. The circles are placed higher for high birth rates, lower for less. They also move to the right as life expectancy increases. You can also hover over any color circle and it will pop up which country it is. You can also do the reverse by hovering over the map area and it will highlight the circles.
http://tinyurl.com/nc7hdqq