Croizat's law

Croizat's Law states that the distribution of species and their evolutionary origins are closely linked to land and sea connections over geological time. Essentially, the shapes and connections of Earth's landmasses influence how species spread and evolve. When continents are connected or close, similar species can migrate and evolve in different places; when they are separated by oceans, species tend to diverge and develop independently. This principle helps explain patterns of biodiversity and how species distributions are shaped by Earth's changing geography over millions of years.