This poster references world peace and serves as an anti-war sentiment. Many soldiers and citizens alike are held down by the chains of war, forced to serve an ultimate power or become captives of an enemy. The comparison of a balloon to life, living, and the earth has been done by many others before. The metaphor speaks of how fragile we are physically and how our spirits crave freedom. 

A chain holds The balloon down, preventing it from flying away. On top of that, it is constricted by barbed wire to the point of just before destruction. It reminds me of the brutality and inhumanness of war and violence. 

The quote in the background stresses the importance of acting because people are suffering now, and their lives depend on it.