In contradiction to the theory that land was the source of all wealth, some political economists proposed the labour theory of value , according to which labour is the true source of value. Many political economists also noted the accelerating development of technology, whose role in economic and social relations was important.
In terms of the theories of thinkers and theorists such as Marx, the economy is inextricably linked to every other cultural / social / political activity. In his base-superstructure theory, the economy forms the basis for every other aspect of human culture
In the social production of their existence, men inevitably enter into definite relations, which are independent of their will, namely relations of production appropriate to a given stage in the development of their material forces of production. The totality of these relations of production constitutes the economic structure of society, the real foundation, on which arises a legal and political superstructure and to which correspond definite forms of social consciousness.
Marx, 1859 from ‘A Contribution to the Critique of Political Economy’