Crisis Cannibalism

'It is also possible that they were by-products of ‘crisis cannibalism’ – the resorting to human flesh when little or no other food was available.'
Below is an image of a scull cap found in a cave in somerset. It appears to be evidence of cannibalism in the early ages. 

Read more: http://www.dailymail.co.uk/sciencetech/article-1357764/Ancient-Britons-drank-skulls-used-cups.html#ixzz1diRtDB9

In the future will it be necessary for us to change our eating habits? Maybe as a human race this will happen naturally. Survival of the fittest and all that. It is critical for this project to consider the food consumed in the future before trying to tackle the scenario of a hungry, over-cramped inner-city slum.