No. its not a destiny for kings to be kings. 6000 years ago... majority of humans might be simple minded and dumb, but there should be some are born with exceptional EQ/IQ. Those are the people who move up the ranks.. and conjuring up schemes that make the majority of the easily-influenced humans feel awed with them and treat them like God and kings.  BUt of course , there are still exceptional people who are kind and belenovent that becomes good kings and rulers.
In modern times, the same pattern emerges... but luckily MOST of the humans are born, and encouraged to get proper education, which makes us good in deciding our destiny and future, and who should lead us . modernity brought a system where no single person can easily "enslave" the rest, unless of course, they are willingly/forcefully to be enslaved and have their mind completely shut off. That is what those dictators are doing, is to keep the people under them to be as simple minded as possible, and closing all possible channels for knowledge outside their own country/domain, just like 6000 years ago. Anyway, the same happens on a small scale everywhere, from a simple as a bogus medium/monk trying to control the believers by putting curse on them if their dunt part with their $$/daughter, to Ayah Pin wannabee.

The rest of the high EQ/IQ people are having enough self conscience to channel their talent somewhere else.. like working and perform researches benefinal to mankind. ONly those with bad/selfish motive resort to evil schemes to control the masses.