The decisive proposition of ‘Un mundo de regiones’ is that regional geography can remain rigorous without treating regions as rigid, mutually exclusive containers. Gómez Mendoza replaces classificatory fixity with ‘geometría variable’: territories may change size, boundary, connectivity and analytical status according to the processes through which they are constituted. The region becomes a medium-scale field where economy, political culture, identity, networks and policy overlap without being reducible to one principle of division. Her methodological argument is equally important: narrative, language and textuality are not ornamental supplements to spatial analysis but tools through which places and regions are produced, recognised and contested. The paper therefore joins scalar reasoning to discursive construction while retaining the discipline’s concern for territorial materiality. Its bridge to contemporary relational geography is unusually direct: spatial units are neither arbitrary nor ontologically fixed; they must be constructed flexibly but rigorously around the relations and problems that make a particular scale analytically meaningful.