So you're saying there's no longer slavery in the world? Actually, that's being pedantic, so let's not do that.
Let me ask you, if all laws were stripped from the books, and government was abolished, do you believe slavery would resurface in various parts of the US? Or do you believe everyone's moral compass has intrinsically changed over the past 100 years to the point where nobody would entertain the idea?
I personally believe we'd see slavery pop up again. Maybe not widespread, but it'd be around. Reason it isn't right now is because anyone who tries it gets their ass thrown into prison for 20 years. Same argument can be made against women's rights. And regarding this type of thing, here's Paul Martin's speech just before parliament voted on gay marriage:
imp-176 Paul Martin speech on same-sex marriage
That's why having a government is a good idea. Protect minority rights from the whims of the majority, which is why there's no longer slavery, and why women can vote, etc.
Slavery will inevitably disappear for one simple reason: robotics will require less energy, are more efficient, are less of a hassle, and you don't have to deal with uprisings.
Instead of making humans our slaves, it's a lot better and easier to make carbon our slave.
This sort of logic can be applied to other parts of society. Representative democracy, for example, exists because we haven't yet taken advantage of the internet to make our collective decision-making. If society continues to progress, we can make collective decisions without requiring a president or any professional politicians.
The problem with government is that it makes decisions that do not represent the collective properly - it cannot. It turns 300+ million entities into 1 entity which acts based on what only a handful of entities decide is best, and that handful of entities spends all of its time convincing the 300+ million that its decisions are to be trusted.
By removing government, you can eliminate wars between nations. By empowering the collective of individuals to police and protect themselves, you won't need a state-run police force to maintain order.
The problem is that the entire collective does not receive the same information. Everyone has different opinions and beliefs because we are all given different snippets of the big picture and as a result it is hard for two individuals on different sides of the country to come up with the same reasoning and conclusions.
Leaders elect themselves with persuasion, not education.