Until these waring factions get together around a negotiating table and peacefully work out a solution, Angola will tread a path along a downward spiral, its people moving ever onward into oblivion and inevitable self-destruction. Progress requires change, and change requires resources. Many of the greatest innovations throughout history have come from unknown sources. Complex ecologies show us that nothing can remain static without disintegrating, all systems and societies must adapt to the present environment and cannot re-enact history and expect past sucesses to persist and past ideas to suffice. The environment in which we live is constantly evolving.
People learn, animals adapt, bacteria mutate, nature fluctuates.
The effect of all these changes is to alter the fitness ratings of the options available to us. Our previous choices may have been optimum for the conditions at that time, we successfully moved to the top of the fitness hill. Yet the changes around us have now altered those conditions, and if we fail to learn anew we will degenerate over time, as our relative fitness reduces in comparison to the options now available.