国际法的起源是一个复杂而多元化的概念，它不仅涉及国家间的正式协议和条约，也包括了习惯法、一般法律原则和国际组织的决议等非成文形式的规范。这些不同的来源共同构成了国际法的“法律之花”，它们相互作用，为国际社会提供了基本的法律框架。

一、条约与协定

条约是国际法最主要的来源之一。根据《维也纳条约法公约》（Vienna Convention on the Law of Treaties）第二条的规定，条约是指“国家间所缔结并经确定其 International law is a complex and multifaceted concept that draws its origins from various sources, including formal agreements between states such as treaties, customs and usages in international law, general principles of law, and resolutions of international organizations. These diverse elements form what is often referred to as the "legal bouquet" of international law, each contributing to the overall framework of laws governing the global community.

Treaties are one of the primary sources of international law. According to Article 2(1) of the Vienna Convention on the Law of Treaties (VCLT), a treaty is defined as an "agreement concluded between States under international law which creates binding obligations." The VCLT sets out the rules for the conclusion, interpretation, and termination of treaties, recognizing their significance in shaping international legal relations.

The creation of a treaty typically involves several steps: negotiation, drafting, signature, ratification, accession, or approval. Once these processes have been completed, the treaty becomes legally binding upon the parties involved. However, it's important to note that not all treaties are equally enforceable; some may be subject to reservations, understandings, or interpretations by individual signatory states.