Thomas Sowell – Equity of performance Share this quote: If you cannot achieve equality of performance among people born to the same parents and raised under the same roof, how realistic is it to expect to achieve it across broader and deeper social divisions? – Thomas Sowell (1930-) Is this quotation insightful, though-provoking, useful? Click on a star to rate it! Submit Rating Average rating 5 / 5. Vote count: 1