Quotations and Literature Forum

I think it's been noted by a number of authors (Thomas Sowell, Friedrich Hayek, etc.) that interracial harmony seems to be best in societies where every individual is free to pursue his economic interests unhindered. Could anyone supply me with a reference to author, title, and exact wording for a quotation along these lines? Thanks.

The complexity of human motivation and social interaction has been increasingly simplified to that of the utility-maximising individual of the economics texts. The consumption behaviour of individuals has received much greater prominence. The apogee of all this was perhaps Margaret Thatcher's statement: 'There is no such thing as society, only individuals and families.' The essential philosophical underpinning of this trend is the neo-liberal emphasis on economic rights as opposed to social goals. Thus the right to pursue economic interests unfettered is held up as being prior to the pursuit of a better society, not least because the exercise of economic freedoms is believed to result in the best outcomes.
~ Clive Hamilton, The Australia Institute
http://www.tai.org.au/Publications_File ... P06SUM.PDF