International relations significantly shape national policies by influencing diplomatic priorities, economic agreements, and security strategies. Factors such as alliance systems, trade partnerships, and global challenges—like climate change or terrorism—can drive nations to adapt their internal policies accordingly. For instance, a nation heavily dependent on imports may prioritize energy security, while those facing external threats may bolster defense spending. The interplay of international dynamics compels countries to respond to both opportunities and challenges, leading to a continuous evolution of policy frameworks that reflect the global context.