* Piketty's data is correct
* him collecting it was a harder feat than one might think
* attributing r>g to some unchangeable nature of capitalism is wrong because "capitalism is infinitely malleable" (every market is regulated somehow, things change a lot depending for instance on whether you do or don't have patents)
* Piketty's policy prescription (a global wealth tax) is unimplementable and harmful in the sense of getting all the attention instead of people focusing on his correct assessment that r>g and then on realistically implementable policies which could change this.