The document discusses the geographical perspective of homelands, specifically focusing on the Hispano homeland of northern New Mexico. It defines key concepts like homeland, cultural diffusion, and innovation/invention as processes of cultural change. The author Richard Nostrand's work from 30 years ago on defining and analyzing the Hispano homeland is also referenced. Specific environments of Spanish homelands in the US are discussed in the context of how cultural traits spread and were preserved over time in isolated geographical regions.