Humanity



Human beings are the primary background characters, minor antagonists, and the primary casualties of war in the Dragon Ball series. While most of the series

History
Humans continued on in much the same way as they did in history books: they created tools, learned to work upright, spent their lives behind a computer and poisoned their own foods with GMOs. Skip forward a few hundred years. Humanity finds itself at odds with itself again, and - not quite being at a point to live off-world, humanity bombs itself into near-extincion, using dirty nuclear missiles to poison the Earth just in case the other side survived.

Both sides did.

89% of humanity had been wiped out in the initial blasts, and many more died as a result of ensuing radiation poisoning, famine, competition for resources, and survival group-fighting. Being that the entire Earth had been effected with radiation saturation, every terrestrial being was effected and either died out, or became stronger due to the cellular alterations that the cancerous radions left behind. Human longevity was reduced down to 17 due to radiation-related sicknesses, and the ones who did survive, reproduced.

Fast forward more than three-thousand years. Humanity has moved away from their tribal darkened past and are now on par with where we stood near the end of the 21st Century, after having to rediscover the routes that it took to get there.

Present
As humanity evolved, the sexes began to grow in different directions. Women are almost assuredly more intelligent than their male counterparts, and in males, their intellect is tied directly to their size and strength. Smaller men are reasonably intelligent, but unable to lift as much as their larger counterparts who can often lift just over two tons.

Relations with Saiyans
After the results of the first Terra-Saiyajin War, the extraterrestrials have been deemed an existential risk by the leadership. This problem was only further exacerbated after Vegeta destroys San Diego in one blow. Now on the wrong end of a losing war, humanity sought a means to negate and eliminate this unified threat, with scientists being split between choosing a head-on approach to confront them, versus a more subtle approach.