It is YOU who are illogical. In order to declare that no one have been at the top forever, you have to know how long is forever, which defeats the purpose of what is forever in the first place.
Have you thought about a job as a circus clown?
Rome, British Empire all have gone down. What makes the US any different?
Ok, so keeping your logic in mind, no one has stayed at the bottom forever. So do we expect Bangla Desh to become the next super power by 2050?
BD is a lot better than your starving filthy India.
India is the only non-sub-Saharan country where millions die due to malnutrition related illnesses every year.