The upshot of all this? The classical economists, led by Smith and Ricardo, had recognised labour, land and capital as three distinct factors of production. But by the late twentieth century, mainstream economics had reduced the focus to just two: labour and capital – and if ever land did get a mention, it was as just another form of capital, interchangeable with all the rest.20 As a result, mainstream economics is still taught today with scant attention paid to the living planet that supports us and the blazing star whose energy we depend upon.21 It relegates ecological stresses such as
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