The process by which a group's native culture is lost under pressure by those of a dominant cultural group. Assimilation occurs when groups acquire new customs, language, and ideologies through contact and education in the dominant society. Assimilation may involve either a quick or gradual change depending on circumstances. Full assimilation occurs when new members of a society become indistinguishable from older members.

Jewish history is the history of the Jews, and their nation, religion, and culture, as it developed and interacted with other peoples, religions, and cultures. Jews originated from the Israelites and Hebrews of historical Israel and Judah, two related kingdoms that emerged in the Levant during the Iron Age.