United states senators who opposed the treaty of versailles mainly objected to

the United States membership in the League of Nations

Explanation: The Treaty of Versailles was the most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers and was signed in 28 June 1919.

The treaty was signed by representatives of each country in June 1919. For the U.S. to accept its conditions, however, it had to be ratified by Congress. Senate Majority Leader Henry Cabot Lodge, a Republican from Massachusetts, opposed the treaty, specifically the section regarding the League of Nations. Senator Lodge argued that the U.S. was giving up too much power under the League of Nations and the Senate voted to reject the treaty.

Ultimately, in place of the Treaty of Versailles, Congress passed a resolution, known as the Knox–Porter Resolution, in 1921 to formally end the war with Germany.

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.  

the scientific revolution brought us a renewed understanding of humanity and our place in the universe, new scientific equipment, and new laws as a basis for future scientific discovery.