What the three cases have in common is that they were all victories for the people and their amendment guaranteed rights against states who wanted to obstruct those. The first case was about preventing states from limiting freedom of speech, the second was about preventing illegally obtained evidence from being used in court, and the third was that the states have an obligation to provide a lawyer to criminals if they can't pay for them.
It is probable that prehistorichumans thought of decorating the body before they thought of making use of anything that could suggest clothing. Before precious metals were discovered, people who lived along the seashore decorated themselves with a great variety of shells, fishbones, fish teeth, and coloured pebbles.
By approval, I think you mean by the delegates from each state had approved it. The problem was that the states themselves had to approve it. That seemed like a cumbersome process, but you have to remember that democracy works on the will of the people and each state had to ratify it keeping in mind that there were still problems: it was not a slam dunk.
A common practice was to pay ridicilously small wages to workers themselves and pay even less to children and women who were working at factories. Another thing that was done was to either import foreign workers who would have to work for even less, or to move production to companies overseas where they would set up a distribution and where workers themselves would also have to work for very small amounts of money. This increased their profit margins.
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