APHUG

diffusion

the spread of cultural elements (ideas, styles, religions, etc.) from a hearth (origin) to other areas

Expansion diffusion

The trait spreads outward from the hearth, growing in strength and area.

contagious

Rapid, widespread diffusion through direct contact (like a virus or social media trends)

hirrerarchical

Spreads from powerful people/places to others (e.g., trends from big cities to smaller towns; Starbucks locations).

Stimulus

The underlying idea spreads, but the trait changes or adapts (e.g., McDonald's adapting menus for local tastes like the Maharaja Mac in India). 

Relocation diffusion

People move and carry their culture with them (e.g., spread of religions by missionaries, migration patterns of languages)

Hearth

The place where a cultural trait originates.

globalization

Increases connectivity, accelerating diffusion.