What is believed that the Sumerians originally used their writing system for what purpose?

The Sumerians originally developed their writing system, known as cuneiform, primarily for the purpose of record-keeping and accounting. This system was used to document transactions, such as trade and the distribution of goods, facilitating the management of agricultural surpluses and economic activities. Over time, cuneiform evolved to encompass other uses, including legal, administrative, and literary texts.