For an article published in the Guardian Sue Blackmore's contribution was shockingly reasonable, even possibly overstepping the mark in terms of school pupils being sorted by race rather than by IQ.

of course, we are also a hierarchical species. 
 
Are we? It could be argued that egalitarianism is humanities more natural default state. That it was civilisation (agriculture) that allowed certain people to maintain feudal aristocracy and the like through force of spear and sword point caused by the Pareto distribution of wealth due to the innovation of individuals, rather than tribes, owning land, with human nature fighting against this and eventually even overturning it in such things as modern democracy and the abolition of slavery. 
 
For example on the view that humanity is hard wired for egalitarianism, 
http://www.amazon.com/Hierarchy-Forest-Evolution-Egalitarian-Behavior/dp/0674006917