Globalization can be defined in several ways depending on one's perspective. It generally refers to the increasing ease of interaction and interconnectedness between people and places worldwide. Some see it as opportunities for growth and development, while others view it as a form of colonization. Globalization is also a dynamic process that is changing as human society develops. To understand it better, metaphors of natural solids and modern liquid phenomena have been used - where solids refer to barriers and liquids refer to increasing ease of movement globally in the modern world.