How would be the world if there is no suffering?
Good question.
Suffering should be fully comprehended.
What exactly is the definition of suffering?
Is been poor suffering? 
Will your suffering be eliminated if you become rich?
We all know about this kind of suffering.
What Buddha taught was more profound than that.
It is not easy to comprehend.
Buddha taught three kinds of suffering.
Dukkhadukkha
Viparinama Dukka 
Samsara Dukkha
Only Buddha taught Samsara Dukkha.