It’s every man’s obligation to put back into the world at least the equivalent of what he takes out of it?

Yes, they should leave as they found for the next generation :)

that's basically a philosophy it is meant to make the international a greater effective place. i does no longer learn it too deeply. He became probable responding why he became so smitten by information the international. He wished to characteristic something significant to it and concept that became a noble purpose for each guy or woman.