Did the allies lay the seeds for future problems in the peace settlement of 1919?

Yes, it is unfortunate but it´s true.

Explanation:

Many provisions of the Treaty of Versailles were too harsh and amounted to a huge humilliation of Germany. In the first place, it imposed severe limitations on the size of the German army, on its types and system of weapons and established a demilitarized zone along the Franco-German border in the Rhineland. Secondly, it included a so-called "guilty clause" that blamed Germany for starting WWI; this was particularly outrageous and unfair in the eyes of the German people, causing much resentment. Thirdly, the gigantic war reparations demanded by the Allies also became a motive of deep dissatisfaction; due to huge economic troubles in the 1920s, the German postwar governments stop paying them. So, all of these factors and unfortunate demands sowed the seeds of a new conflict.  

native american contribution: the patriots from britain learn how to hunt, fish, and introduce diversity within cultures.

african americans: indirectly introduced the idea of diversity to americans. africans coming to america because of slavery taught white americans that people come from different backgrounds and colors. it also built america's economic stability for a great period of time. 

women: make america what it is today. there are some societies that are in the world currently that do not give women the same right we give women here in the united states. because women have rights here in the united states, other countries' citizens strive to come to america, especially women, since they have equal rights in the united states. this is important because america is seen and desired by many in the world. 

children: children are our future. we learn from our elders and carry out things the same or differently learning from america's history. we continue tradition and change tradition if it is needed. 

i do not believe this was true indefiantly the native americans would have lsot aganist america one they didndt have the resources and allies that america had and 2   indians werent as advanced at the time as they were not 3 americans had the expreince because some of the soliders from other wars fought in that war and were attecked etc