The author includes the section 'Reactions to a troubled world' to compare the leadership of different countries across Europe.
<u>Explanation:
</u>
In the section titled 'Reactions to a troubled world', the author has narrated how the leaders from different European countries behaved after World War I.
He has mentioned about the invasion of Ethiopia by Mussolini and also about the breach of the treaty of Versailles by Adolf Hitler.
The author has also written about the inactivity of the leaders of France and Britain.
