Do you think we can get rid of this once we leave the planet and go multi-planetary? We will bring our gray matter with us. May a few generations grow up and they will repeat our mistakes.
Possibly the only solution is to get way smarter by gene editing and preserve as much data as we can from our age.
Over time, populations adapt to their circumstances. In a society in which Malthusian pressures operate, and the thrifty and peaceful out-reproduce the violent and improvident, society will become more thrifty and peaceful over time -- and will eventually become prosperous and organized enough to escape the Malthusian trap. (The opposite pressures can also operate, but you need external sources of chaos for selection in favor of chaos to occur. Order is normally self-establishing, self-reinforcing, and stronger than chaos over time.)
A Farewell to Alms discusses this in great detail; England began the Industrial Revolution (i.e. broke out of the Malthusian trap) in the late 18th century, but if not for them, the Continent would have done it in the 19th; if not the Continent, then Japan in the late 19th or China sometime in the 20th.
If you can get to another star in a reasonable amount of time, you are likely sewing the seeds of your own destruction. The amount of energy in a relativistic weapon makes nukes look weak.
