Sry but I hope u get the right answer :O
The correct answer is <span>William McKinley
President McKinley beat William Jennings Bryan and led the United States to a new era of prosperity where the parties started fighting for strong economy and human rights. This was the beginning of the progressive era after which presidents like Teddy Roosevelt came.</span>
The most obvious answer surely is language.
Language enabled people to communicate in the earliest of days, when mankind was still in its infancy. Language made communication between different societies faster and most probably contributed a lot to the quick spread of our species around the planet; especially the quick technological advancements we have witnessed in the past.
The railroad helped because it provided a means of transportation both safely, and quickly.
Answer:
To reconcile the North and the South into 1 Union
Explanation: