Exploitation of nature leads to ecological disaster and depletion, and exploitation of other people leads to violence, crime and warfare. Cooperation is the key to an ever expanding world of possibilities. There are definite limits to what we can take, from nature or from individuals, but there is no limit to how much we can create, improve and progress together, in harmony with all life. Most thinking people will agree that these seven problems must eventually be solved. The only thing that can be argued is whether they can be, in the face of deeply entrenched and vested opposition, and equally embedded ways of thinking.
Survival dictates a positive attitude about our chances for success.
The only thing really debatable is a timetable for achieving such vast changes. We must stop the explosion of the human population, and get it to a steady state at a reasonable level. This is a mathematically certain crucial problem we must solve, for it drives all our other problems. It can be argued that we have already surpassed the Earth's comfortable carrying capacity for human population. This is a certainty if all humans were to live like people do in the more affluent nations of the world.