The invention of the Bessemer Process.
The transcontinential railroad brought more money to the railroad companies because more people had access to the railroads, therefor using them more, and money was brought in. Not 100% sure, but that is my guess
Enlightenment thinkers believed that all citizens are born with natural rights
With less slaves the south experienced food shortages. Food shortages also brought with with them inflation.
Fingerprint matching is determined through unique characteristics. To achieve it must have certain ridges. loops and whorls. The characteristic points are then compared to the prints on the system. When forensics finds that there are enough similar matching points, they state whether they are fingerprints in which they match or not.
It is assumed that prints are one hundred percent positive, that is their use is one hundred percent successful with a zero error.
However, the prints are not considered scientific evidence, but it is still a presumption. There is never a hundred percent matching the prints, but just the similarity within the prints.