The spread of language was complex and expansive, with what evidence? There are many language families, each with multiple branches from language diffusion.
As people migrated, their language died away.
The population of the world is massive.
Some languages disappear due to conquest, or lack of use by a population.

Why were chinese american immigrants frequently detained when trying to immigrate through angel island? the rules for immigration were stricter at this checkpoint due to health issues that were prevalent among asian populations at this time. the location of the island was difficult to reach, and ships to the mainland were often prevented from sailing more than once a week. immigration agents were notorious for asking immigrants confusing questions as a means of denying them entry. low wages caused a shortage of immigration officials, so many immigrants had to wait weeks or months before their applications were processed.

Who was the fifth president of the u. s.

Whose plan centered on keeping the federal budget balanced, instituting tax cuts, and developing public works projects?