Cultural Hearth: A cultural hearth is an area where new ideas and innovations originate before spreading outwards influencing other regions.
Diffusion Barrier: A diffusion barrier refers to any obstacle that hinders or prevents the spread of an idea, innovation, or cultural trait from one place to another.
Adoption Curve: The adoption curve represents the rate at which a new product, idea, or trend is adopted by different groups in society over time, ranging from innovators and early adopters to laggards.