The development of civilization and industry in general has always shown itself so active in the destruction of forests that everything that has been done for their conservation and production is completely insignificant in comparison. – Karl Marx
Capital is reckless of the health or length of life of the laborer, unless under compulsion from society. – Karl Marx
Natural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science. – Karl Marx
We should not say that one mans hour is worth another mans hour, but rather that one man during an hour is worth just as much as another man during an hour. Time is everything, man is nothing: he is at the most times carcass. – Karl Marx