all "physical" problems such as environmental degradation, shortage of water/food/energy, etc., can be solved.
I share some of your optimism zhao. Using our creative capacities for innovation and cooperation we - that is humanity as a whole - can and do address our shared problems. But it ain't that simple. Humanity rarely thinks as a whole, it is divided along many lines. Often a problem solved for one person/group is a problem created for another. Also, in solving a problem it is common to generate novel problems in the process. The cumulative effects of this mean that we undergo continual adaptation and transformation; but there is no single direction and no end-point.
This:
it's the system which prevents and stops the solutions from being implemented.
the power, as always, is the real problem.
is, IMHO, pretty meaningless. To make it meaningful you would need to be specific about what constitutes this "system" you refer to; and the nature of this "power", i.e. who holds it, where/how it is manifest etc
It's not that i don't think there is a system (cos that would be stoopid). In fact there are many systems - ecological, social, political, economic; and working at many levels - i.e. local, national, transnational, regional, global etc. They overlap of course.
It seems to me that we can see a decentralization of power taking place in the world as a result of - amongst other things - the effects of successive technological revolutions, the privatisation and deregulation of state functions and national economies, and the proliferation of increasingly influential non-state actors. Therefore the number of nodes of influence/authority/power in the overall "social" system of humanity are increasing. We live in a messy age.