The assessment of the post-World War I peace treaties, including the Treaty of Versailles, highlights several contentious issues and the challenges faced by the Allied Powers in shaping the post-war world. Here are some key points to consider:

1. Dictated Peace: The treaties, particularly the Treaty of Versailles, were perceived as dictated peace because Germany was not included in the negotiations and had limited opportunity to express its concerns. The lack of German involvement in shaping the peace settlement would later be used as a source of resentment and grievance.
2. Disarmament of Germany: The strict disarmament clauses imposed on Germany were seen as excessive and, in hindsight, contributed to its vulnerability and internal instability. These disarmament provisions were not applied equally to other European powers, which added to the sense of unfair treatment.
3. Principle of Nationality and Self-Determination: The Allied Powers had emphasized the principles of nationality, ethnicity, and self-determination as key justifications for reorganizing European borders and creating new, independent states. However, the application of these principles was inconsistent, as several examples, including the treatment of Germans, Turks, Arabs, and Indians, demonstrated. This inconsistency would have far-reaching consequences in the decades to come.
4. Arab and Indian Dissatisfaction: Promised independence for Arabs and Indians in exchange for support during the war did not materialize to the extent expected. This led to disappointment and frustration in these regions, ultimately fueling independence movements and conflicts.
5. Dismemberment of Turkey: The dismemberment of the Ottoman Empire was another contentious issue, especially among Muslims. The non-fulfillment of promises made to Indian and Arab nationalists regarding the treatment of the Ottoman Empire further strained relations and contributed to the rise of nationalist movements.

Overall, the peace treaties of the post-World War I era laid the foundation for geopolitical tensions, grievances, and conflicts that would persist for decades. The failure to achieve a just and lasting peace, as envisioned in Woodrow Wilson's Fourteen Points, set the stage for future conflicts, including World War II.

The principles of nationality, ethnicity, and self-determination were inconsistently applied in the aftermath of World War I. These examples illustrate how the implementation of these principles led to complex geopolitical and social issues, which in turn contributed to future conflicts and movements for independence. Here's a summary of the key points:

1. Germans:

• Significant German populations found themselves in newly created nations like Poland, and union with Germany was forbidden for Austria, despite its substantial ethnic German population.
• The treaties led to the inclusion of millions of Germans in places like Sudetenland, which became part of Czechoslovakia. This situation provided a basis for Hitler's territorial claims and expansionist policies leading up to World War II.

2. Turks:

• The Treaty of Sèvres, by allocating territories populated by Turks to Greece, violated the principle of self-determination.
• This contributed to a surge of nationalism in Turkey, ultimately leading to the rejection of the Treaty of Sèvres and the renegotiation through the Treaty of Lausanne in 1923.

3. Arabs:

• Despite their support for the Allies in World War I and aspirations for independence, the Arabs did not achieve their desired level of autonomy.
• The talks regarding the creation of a Jewish state in Palestine further fueled discontent.

4. Indians:

• Despite the participation of many Indian soldiers on the side of the British in the war, India did not gain meaningful autonomy.
• The Government of India Act of 1919 fell short of the Indian National Congress's aspirations for self-governance and self-determination.
• Broken promises by the British, along with incidents like the Jallianwala Bagh Massacre and the implementation of the Rowlatt Act, contributed to the Khilafat and Non-Cooperation Movement.

These examples demonstrate the complexities and challenges faced in applying the principles of self-determination in the post-war era. The resulting tensions and grievances would have profound implications for the geopolitical landscape and the struggles for independence in the years to come.

The Treaty of Versailles and its aftermath indeed contained several contentious points and contradictions:

1. Economic Viability vs. Austria-Germany Union: The treaty's application of the principle of "economic viability" was inconsistent. While Allied Powers cited economic viability to justify accommodating areas with German populations in the newly created states, they ignored the possibility of a union between Austria and Germany, which could have made economic sense.
2. Loss of Colonies: The objection raised by Germany regarding the loss of its African colonies had some validity. The distribution of these colonies as mandates favored the imperialistic ambitions of the Allied Powers. The mandates were primarily granted to the members of the Allied Powers, effectively leading to the annexation of German colonies by these countries.
3. War Guilt Clause: The War Guilt Clause that solely blamed Germany and its allies for World War I was seen as unjust and humiliating for the Germans. The clause was intended to legally hold Germany responsible for the war and impose war reparations.
4. War Reparations: The substantial war reparations demanded from Germany were indeed punitive and aimed at weakening Germany's economy in the foreseeable future. The initial amount of 6600 million pounds was considered excessive.
5. Reduction in Territory for Austria and Hungary: Austria and Hungary were significantly reduced in size in terms of territory and population, with much of their industrial wealth going to new states like Czechoslovakia and Poland. This territorial loss had economic repercussions and led to financial difficulties.
6. Neglect of Free Trade: Despite President Wilson's Fourteen Points advocating for free trade among nations, trade barriers were introduced by many newly created nation-states. These barriers hindered economic recovery, particularly in Austria.
7. Exclusion of Russia: The communist regime in Russia was not invited to the peace negotiations, and Russia did not gain much from the peace settlement. This contributed to further isolation and tensions in Europe.

The Treaty of Versailles was indeed a complex and contentious document with various implications and consequences, some of which would continue to shape the political landscape of Europe and the world in the decades that followed.