As I've stated before, if you do away with all the guns on the planet, you'd be left with knives, swords, spears, bows, etc. Only those with the strength and skill to weild one of those weapons would be able to defend himself. That leaves out women, children, and the elderly.
Now, do you want to talk about a bloodbath?
Besides, gun ownership is at an all-time high (250+ million privately-owned firearms in the United States) while violent crime is at a 35-year low and murder is at a 43-year low. That's according to the
FBI crime statistics. So, gun control laws do the opposite of what they're intended to do by only disarming law-abiding citizens.