Because earth is long enough a self-contained system, the conservation law is valid also for humankind: In the long run we cannot escape from the summary effect which we produce.
As humans we can make a temporary distinction between inside and outside. Depending on the context, the "inside" is often enhanced to groups and nations and arbitrarily called "good" (- in contrast to the outside), because we temporarily have more information and control about the "inside".
But if we look at the whole, we see that these definitions of "good" and "bad" are completely arbitrary. They produce a lot of contradictions and (as consequence) a senseless waste of energy and even dangerous conflicts. They result from restricted short-term thinking.
Restricted short-term thinking is especially dangerous for the most responsible leaders.
They should be most interested in harmless solutions.
In case of a conflict it is recommendable to meet as early as possible at the truth.
Restricted financial data and concentration on quick return on investment of money-equivalents can encourage restricted short term thinking. Such thinking neglects essential tasks without individual return on investment, e.g. conservation of environment, education, development aid, old age pension. So it generates the reasons for population explosion. It leads to worldwide accumulative pollution and exploitation of the environment. Global consequences already become visible (e.g. climate change). Long term damage is much underestimated.
If long term damage can be initially hidden and if it does not cause early enough clear "costs" for the causer, there is temptation to restricted short-term thinking.
Large scale nature has a delayed long-term feedback and the facts are obvious:
If humans too late stop to destruct preconditions of human life on earth, the future of human life on earth will be severely damaged or even destroyed.