What slowed down the U.S. entrance into World War 1? I already have many Americans simply did not want to send their sons to war and pacifists urged the United States to set an example for peace. I need one more.

Your question presumes it should have been faster. I am most uncertain history can lay a solid argument for that. The US entered the war, it stalemated, and created the roots which lead to a second world war. The close of the war also greatly enhanced the progress of the Bolshevik revolution, which was not in the US interest.

This was the war to end all wars.

Your answer is pretty complete: Americans did not see the war as theirs, and had a strong bias to stay out of European affairs. There was a movement also to set the example by not expanding it further, but that is debatable. More debatable is the role of US industry (War industriers) in getting the US involved. A lot of them really wanted to sell war goods.

I agree with Bob Pursley. Here's a little more information.

"The reasons the United States got involved in the war are numerous and much-debated. In 1922, the US government created the Nye Committee to investigate the matter. The committee reported that between 1915 and April 1917, the US loaned Germany 27 million dollars ($27,000,000). In the same period, the US loaned Britain and its allies 2.3 billion dollars ($2,300,000,000), or about 85 times as much. They concluded that the US entered the war because it was in its commercial interest for Britain not to lose."

http://publicliterature.org/en/wikipedia/w/wo/world_war_i.html#United%20States%20Neutrality

=)

What speeded it up?

Well, it seems like there were quite a few factors that slowed down the U.S. entrance into World War 1. Maybe they were just taking their sweet time, enjoying some popcorn and waiting for the perfect moment to jump in. Or maybe they were just trying to decide who would win in a pillow fight between the Allies and the Central Powers. Who knows? History can be a real clown sometimes.

Another factor that slowed down the U.S. entrance into World War 1 was the policy of neutrality. The U.S. government, under President Woodrow Wilson, initially declared a policy of neutrality and aimed to stay out of the war. This policy was supported by many Americans who believed that the war was a European conflict and did not directly affect the interests of the United States. The desire to maintain neutrality and avoid getting involved in foreign conflicts was a significant factor in slowing down the U.S. entrance into the war.

Another factor that slowed down the U.S. entrance into World War 1 was the policy of neutrality maintained by President Woodrow Wilson. This policy aimed to keep the United States out of the war and avoid taking sides between the warring nations. President Wilson believed that the U.S. had a moral duty to act as a mediator in the conflict and work towards a peaceful resolution.

During this time, the United States faced challenges in maintaining its policy of neutrality due to acts such as the sinking of the British ocean liner Lusitania by a German U-boat in 1915, which resulted in the deaths of American citizens. While these incidents caused public outrage and increased pressure for the U.S. to take action, President Wilson still pursued a policy of neutrality.

It was only after several significant events, including the resumption of unrestricted submarine warfare by Germany and the interception of the Zimmerman Telegram (a secret communication from Germany to Mexico proposing an alliance against the U.S.), that the U.S. eventually entered the war in April 1917. The Zimmerman Telegram particularly swayed public opinion and led to a shift in the U.S. stance towards Germany.

Therefore, one of the factors that slowed down the U.S. entrance into World War 1 was President Wilson's commitment to neutrality and his efforts to find a peaceful resolution to the conflict. It took significant events and a change in public opinion to finally push the U.S. into joining the war.