Human beings are also becoming less immune to disease, the next generation is already showing signs of have less ability to hold off flu or ashma, so science is sometimes weakening the human race, what is the point of a cure for say cancer if at the same time we are dying from influenza.Weakness will always be found out anyway and strength will always push forward, it's no coincidence that people in poverty in modern countries are also the least optomistic, strength means you have the ability to always fight harder for what you need to survive. Poverty in countries ravaged by war and famine is obviously different but there is still a section that is strong and finds a way to survive - with or without morals.
The reason for obesity is man made - humans are consuming foods that they are not built to eat.Processed foods are scientifically built and our digestion was never built to process it.Obesity is the bodies way of fighting against and showing us there is a problem. No other life form has developed changes in their foods which directly harm their species .If an animals food source dries up it dies. Human (so called intelligence) has led to nicotine addiction,drugs alochol all man made issues which will help to bring about the demise of the entire human race.Survival of the fittest is more important now than it has ever been.The people that can eat correctly and stay fit without becoming addicted to man made substances will survive,the rest are being warned on a daily basis.
I already mid foot toe strike though all be it in a pair of Saucony Triumph with a huge heel ,I will take your advice though .Aren't Kinarva just like a pair of racing flats - would I have to build up to longer runs in those also ?
Even with the kinarva as they do have some cushioning - my mileage is quite erratic ,usually 3 10 milers and a 10k in the week then anything between 16 and 23 on a Sunday,I don't follow a plan just run as far as I feel like - should I run a 10 miler for example straight away with new shoes or cut back to say a couple of fives ?