Explanation : The great thinkers of liberal economics
believed that free trade would benefit all
parties through the mechanism of what they
termed “comparative advantage.” The
Scottish economist David Ricardo established
comparative advantage as the logical basis
for free trade as long ago as 1817. He showed
that everyone would enjoy higher incomes
and a better standard of living if every
producer, be they country, company, or
individual concentrated their activity in areas
where they had the greatest cost advantage
(or the smallest cost disadvantage) over their
competitors.
To illustrate his theory, he took the example
of two countries, Britain and Portugal, and
two products, wine, and cloth. In the early
nineteenth-century Britain was the most technologically advanced economy in the
world, but Portugal has a much better climate
for grapes, so Ricardo argued that the welfare
of both would be maximized if Britain stuck
to making cloth and imported Portuguese
wine. Any other arrangement would be a
waste of time and money.