The development of international commercial law has been a gradual process that has taken place over several centuries. Here is a brief overview of the key milestones in the history of this field:

1. Ancient times: The earliest forms of international trade can be traced back to ancient civilizations such as the Egyptians, Greeks, and Romans. These societies developed basic rules and customs to govern trade, including the use of contracts and the establishment of marketplaces.

2. Middle Ages: During the Middle Ages, trade between European cities and other parts of the world increased, leading to the development of more complex legal systems to regulate commerce. This period saw the emergence of merchant guilds, which played an important role in establishing trade practices and standards.

3. Renaissance: The Renaissance period saw a renewed interest in trade and commerce, as well as a growing recognition of the need for legal frameworks to govern international transactions. This led to the development of new legal concepts and institutions, such as bills of exchange and insurance policies.

4. Enlightenment: The Enlightenment era, which spanned the 18th century, was marked by a focus on reason, individual rights, and the rule of law. This intellectual climate helped to foster the development of modern international commercial law, as thinkers such as Montesquieu and Voltaire advocated for the creation of uniform laws and regulations to govern trade.

5. Industrial Revolution: The Industrial Revolution of the 19th century brought about significant changes in the global economy, leading to the growth of multinational corporations and the expansion of international trade. This period saw the emergence of new legal instruments, such as joint-stock companies and trusts, which helped to facilitate cross-border investment and commerce.

6. Early international agreements: In response to the growing complexity of international trade, states began to enter into bilateral and multilateral agreements to establish common rules and standards. Some of the earliest examples of these agreements include the Treaty of Paris (1860), which established rules for the carriage of goods by sea, and the Berne Convention for the Protection of Literary and Artistic Works (1886), which set standards for copyright protection.

7. League of Nations: The League of Nations, established after World War I, played an important role in the development of international commercial law. The organization adopted several conventions aimed at promoting trade and regulating economic activities, including the Convention on Limitation Period in the International Sale of Goods (1932) and the Convention on the Contract for the International Sale of Goods (1932).

8. United Nations: After World War II, the United Nations became a major forum for negotiating international commercial law. The organization adopted several key conventions in this area, including the Convention on Contracts for the International Sale of Goods (1980), which replaced the earlier Convention of 1932, and the Convention on the Carriage of Goods by Sea (1978).

9. Globalization: In recent decades, globalization has had a profound impact on international commercial law, leading to the further integration of national economies and the emergence of new forms of cross-border activity. This has prompted the development of new legal frameworks and institutions, such as the World Trade Organization (WTO) and various regional trade agreements, to help regulate global commerce and ensure fair competition.
/To convert into a simple sentence