Home alone... with the app

After a few dozen minutes of fooling around, the girls were ready to go. Josh entrusted his credit card and the keys of his car to Sara, and all three of them kissed him on the lips before leaving.

Josh was suddenly alone. A strange feeling after the crazy night he just had.

However it wasn't like he had nothing to do. He had the app, and he still didn't know the full length of its capacities. Sure, he used it repeatedly in the span of a day, but it was mostly to improve his sex life. Maybe he should start using it to make the world better. Or funnier.

• The human immune system is extremely efficient and can easily distinguish a harmful virus or microorganism and get rid of it while never making any mistake.
• Mammoths woolly rhinoceroses still exist in the twenty first century.

There, one altruistic rule and one for the lol. He pressed the button, then went to his computer to check how it changed the world.

The results surprised him. To begin with, he quickly found out that the human population was now above ten billions and several parts of the world were overcrowded and suffered from pollution. Not only in Asia, but in Europe too, as well as in the Americas. Humanity never suffered from big epidemics such as the black plague, after all. He then realised that Native americans now constituted twenty two percents of the American population, and it was only for the part actual USA. The West Coast and most of the Great Plains were made of Mexican states, former Chinese or Russian colonies and a few Native republics. It turned out the United States didn't expend as fast without the help of smallpox.

He also found out mammoths now lived in the wild in Canada, Alaska and Siberia, but most of them were domesticated for the wool, the meat, the milk and to serve as pack animals. Mammoths farms were relatively common in Northern Europe and even in New England, and he even discovered that the Russian army used them as war beasts until the nineteenth century. And Finland was famous for its mammoth cheese. The more you knew...

As for woolly rhinoceros, they also lived in Europe and Siberia, but they were only found in the wild and were on the verge of extinction in several countries.

Anyway, this overpopulation thing might be a big problem. Josh decided to get rid of it.

• Mars and the Moon have a breathable atmosphere, fertile soil and drinkable water in abundance. Humanity was able to colonize them in the second half of the twentieth century.
• Only one out of twenty humans is male.

After those new rules, Earth population was down to four bilion peoples, with one more on the moon and two and a half on Mars. He suddenly realized that this last move was rather careless, since he could have turned into a girl or have one of his girlfriend sent to another world, but he was quickly relieved when he found out that he was still Sara and Kelly's boyfriend on all their social network accounts, and even though Christelle did not change her status yet, she was still living in the same city and might still be shopping with the girls. And he still had a dick.

That's when the doorbell rang.