In the 20th. century we went from horse transport to moon transport.
Innovations in science, communications, technology and medicine allowed the world population to grow to 6 billion.
Too many people for the earth to sustain at the luxury level we live.
The innovations of the 20th century were not accompanied by an equal advance in human thinking.
We are still essentially cave men (with nuclear weapons) lighting as big a fire as we can and in the process polluting our world to the point of destruction.
Thus the 21st century will pay our debts and this will be the history of the 21st.century.
Can they do it?
No.
Allready, 10 years into the 21st. century, our stone-age economic system is beginning to buckle and will collapse soon.
The growth of population to 9 billion people in the next 30 years would destroy the earth if it were allowed.
As the hunger and cold of the 21st.century begin to bite mad warlords will take over the world’s governments.
We will be fighting like a desperate rabble in the streets before the next decade is over.
Hunger, cold, famine, pestilance and plagues.
Thus ends the history of the 21st.century.
The few savages who survive will re-build , in time.
Let’s hope they learn from our disasterous mad dash for everything.
why do you say...
"Too many people for the earth to sustain at the luxury level we live. "
I say nonsense.
It's all matter of resource distribution and efficiency in living/habitation design.
Everyone on earth could live in a utopia of free housing, medical, transportation and food if the current system of economic rape and waste production was changed to a democratically controlled socialism and the serious abandonment of the addiction to a war economy and enforcement state that serves the pond scum at the upper %.1 of the wealthy.
We already have Corporate Socialism for these parasites.