So if Kim Jong Un dies without a son what happens? Does it matter if his daughter takes over, or can only a son rule over there.

If a son is required to rule and he only has daughters what do you think will happen? Will somebody else take over control of North Korea and it will stay a communist state, or will the south try harder than ever to reunify and will they reunify?

What do you think will happen. I know that Kim Jong Un is only in his 30s, so he still has time to produce an heir, but this still makes for a good question.

If he dies without a son, this would be the perfect time dismantle the N. Korean government and create a whole Korea. The people of N. Korea have suffered long enough.

Well, he said pretty much everything. 

The problem is these people have been fed lies literally their entire life about the outside world. They for the most part would probably be absolutely against anyone who would try to come in to fix the country. Even more so than th Muslims in the middle East.

Simple solution, Dennis Rodman would become president.

Super Mario or Luigi

It's truly sad that we're messing around in the Middle East when North Korea is probably the most oppressive state in the world.

Doesn't he have a younger/older brother?

ME!!! CHOOSE ME!!!!! I want to get rid of all nuclear weapons and put them into space asteroid belt!

The military would just put one of their men in there directly. The Kims have leaned very heavily on the military as their support base (since theirs was not an organic "revolution" in the beginning, so they don't have the kind of grass-roots basis that Bolshevism had in the USSR or has in China. They were basically foreigners, hiding out in Manchuria and the Russian Maritime Provinces, Korean by ethnicity but not by birth, and armed and sent in by the Soviets after the Japanese retreat from Korea). Il-Sung and *especially* Jong Il gleaned their legitimacy (such as it was) from military support, and supposedly military veterans (especially survivors from the Korean War era) are the biggest supporters of the regime domestically.

If the Kim line died off and it didn't mean the end of the DPRK as a whole, it would be a Generalissimo of some sort who got the helm.