Thomas Edison invented the most widely available version of the light bulb. With the advent of AC/DC electricity cities soon began to have streetlights. This would make for a good crime deterrent.
A unitary system of government is a monarchy. Which means that the country is ruled by one person or a group of people. An example of a unitary system is a country that is run by a royal family, that consists of kings and queens.
A federal system is a system is a system of government that is run but not ruled by a government that has many different political parties and many different people. The United States is an example of a federal system.
According to a British army doctor, a cotton plantation should have one slave per two acres, coffee should have two slaves per three acres, and sugar plantations (the worst of the worst) should have one slave per acre
The main factions were the Radicals and Conservatives.