Mepụta ụdị nke ahịrịokwu a dị mgbagwoju anya A họpụtara Levi dịka onye otu National Academy of Sciences na 2015 ma bụrụ onye otu nke American Academy of Arts and Sciences kemgbe 2001.
N'ezie, ụdị okwu dị mgbagwoju anya nke ahịrịokwu ahụ bụ "A họpụtara Levi dịka onye otu nke American Academy of Arts and Sciences na 2001 ma bụrụ onye isi oche nke American Political Science Association maka 2004 - 05. "