Answer: The problem and solution organizational pattern creates a mood of hope and possibility; this persuades Americans that they must act to secure a more certain future.
Explanation:
The excerpt is organized in a problem and solution pattern - the problem is the need to live in a world full of freedom and peace, while the solution is that the nations themselves must put certain effort in ensuring peace and stability. The purpose of this organizational pattern is to convince the American people to take some action regarding their future.