The parallels in their canons of taxation epitomise their joint belief in natural liberty and equality.

In this state of natural liberty, society will be their first thought.

They give up their natural complete liberty in exchange for protection from the Sovereign.

But if Adam Smith was correct to call his free market economics a "system of natural liberty," this will not be possible.

Perhaps most importantly to the problem of poverty, private property in land violates people's rights to liberty-the pre-existing, natural liberty to use the opportunities nature provided.

He described his own preferred economic system as "the system of natural liberty."

On this latter topic he first expounded his economic philosophy of "the obvious and simple system of natural liberty".

To remove a man who has committed no misdemeanour from the parish where he chooses to reside is an evident violation of natural liberty and justice.

Such regulations may, no doubt, be considered as in some respects a violation of natural liberty.

Smith argued for a "system of natural liberty" where individual effort was the producer of social good.