Final answer:
Geiss argues that the Triple Alliance was a defensive measure to safeguard Germany's leadership and interests.
Step-by-step explanation:
The Triple Alliance, also known as the Central Powers, was an alliance formed by Germany, Austria-Hungary, and Italy before World War I. Geiss argues that the Triple Alliance was created by German Chancellor Otto von Bismarck to check the power of Russia and France and prevent them from becoming more dominant in the region. Geiss suggests that the alliance was a defensive measure to safeguard Germany's leadership and interests.