Disintegration (noun)

1. The process of breaking down into smaller parts or fragments.
2. The process of coming apart or breaking up into component elements.
3. The decline or breaking apart of a unified whole.

Origin:

Late 19th century, from dis- + integration.

Examples:

1. The disintegration of the Soviet Union marked the end of the Cold War.
2. The rock's disintegration into smaller pieces was caused by weathering.
3. The disintegration of the empire was a slow process over several centuries.
4. The rapid disintegration of the company was a result of poor management decisions.
5. The disintegration of the marriage was a painful process for both parties.