African Chacos

"Mma Ramotswe nodded. She was familiar with people who liked to test out all sorts of theories about how people might live. There was something about the country that attracted them, as if in that vast dry country there was enough air for new ideas to breathe. Such people had been excited when the Brigade movement had been set up. They had thought it a very good idea that young people should be asked to spend time working for others and helping to build their country; but what was so exceptional about that? Did young people not work in rich countries? Perhaps they did not, and that is why these people, who came from such countries, should have found the whole idea so exciting. There was nothing wrong with these people--they were kind people usually, and treated the Batswana with respect. Yet somehow it could be tiring to be given advice. There was always some eager foreign organisation ready to say to Africans: this is what you do, this is how you should do things. The advice may be good, and it might work elsewhere, but Africa needed its own solutions." Tears of the Giraffe, Alexander McCall Smith

Which do you think lasts longer...a Vibram sole or a tire sole (usually guarenteed for at least 35,000 miles)?