Is a perfect world possible?
Imagine you are in the year 1798 and you are Thomas Robert Malthus. The Industrial Revolution in England has only begun a couple of years ago in 1785. Malthus argued in his essay, "On Population" that a perfect world isn’t possible due to the Earth being a set size and the population increasing constantly. The power of population is greater than the power of Earth to produce subsistence of man.
Now, imagine you are Malthus and you have somehow been transported to today, the year 2013. How would Malthus react? Would he see that, due to advances in agriculture and farming methods providing more food than we could possibly consume, a perfect world is possible in this day and age? More importantly, do you think his argument would change at all? Can an imperfect world become perfect?