World’s end (literally)

Not too distant in the future past
earth became flat, at last
the end and the beginning could be seen
and all that is, in between,
Too much weight on either side
It will tilt, break, or just divide
Sapiens have to think new rules
learn survival skills, old fools
fighting, war, greed and lust
leave everything if living must
balance earth’s weight all around
animals, forests, water and mounds
best brains worked day and night
at last, a solution was in sight
Cities moved thousand miles each side
counted, measured, every wave every tide
No cast, creed or money worth a lot
Together ploughed away, without a thought
Humanity survived this colossal task
United, they can achieve any big ask
Nature should have made earth flat at inception
would have saved Sapiens from all death and deception