People like to criticize it every time someone says it, but anyway here it goes: Idiocracy is a documentary. When the pill was invented, people all of a sudden discovered an easy, "100% effective", way of avoiding having an "unexpected" baby. Guess what: for most of human history, most of the babies were "unexpected". People can try to deny it, but having a kid is a HARD JOB, expensive and, for many people, just not worth it. From a thermodynamic point of view, we are beings that exist in a universe where you are rewarded for expending the least ammount of energy you can. So, we're basically LAZY, on average. Nature "knows" this, so it put sexual pleasure encoded in our genes in order to make us reproduce, even if in every other area of our life, we are rewarded for choosing the easiest alternative. So, "unexpected" babies it was for 99.999999999999999% of human history. Now, everyone who has an IQ of 100 or more is able to avoid those unexpected pregnancies, and so they are doing it. And it leads to the UNAVOIDABLE conclusion that as time passes, the average IQ of the people that keep having babies will be lowered. Natural selection is a law of physics in this universe. Over time, birth rates will start to go up again, be it in 100 years or more, but it will. Since the people of the future will be the descendants of the people that, even today, with easy and effective contraception, choose to still have kids (or simply had no idea how to no to). But I'm pretty sure we're not headed to the Star Trek future, it's Idiocracy from now on. I really don't care. I'm lazy and probably will end my lineage at this point in time anyway.