Thread running through all pieces: We Are All Connected. Hence interdependent. This is evident in thinking about Climate Change, of course. Rivers, air, make for a dynamical system continually flowing.
Poor people matter to us - even far off as with the Bottom Billion. Besides speaking to who we are as a people, since we're connected, their problems do become our problems. We can't build large enough walls to keep the world out.
In all these cases economics and ecology intertwine, have to keep our eye on both to forge ahead.
Distinction between we/they - othering of people, leads to violence, lack of care - ultimately, seeing we're all connected, there is no division, only we - is key to all of our survival.....