> negatives of bigger hips scale with the radius of the head Implying linearity here is ridiculous. The increase in force applied to the hip joint scales with

> negatives of bigger hips scale with the radius of the head Implying linearity here is ridiculous. The increase in force applied to the hip joint scales with the radius of the head; cartilage gets damaged if you apply too much force but will last a lifetime if you don't. > the benefits of intelligence scale with the volume That's completely unsupported. Firstly because the number of brain cells scales with the volume, but there's no evidence that larger brains in humans are associated with higher intelligence (then again, most mutations are negative), and secondly because it implies a linear relationship between 'amount of intelligence' and 'amount of benefit'. > given how much food production has been increased through ingenuity this seems unlikely to be the case This has not happened on evolution-relevant timescales. There was famine in eastern Europe only 50 years ago. People died of hunger because their calorific needs were not met - selection pressure towards surviving famine has not stopped.