Topic sentences are declarative statements that summarize the main idea of a paragraph. Forming the main point of the paragraph into one sentence can help you write topic sentences. For example, if your paragraph discusses how the bus system can make more money by raising fares, your topic sentence might be "Raising fares will help the bus system increase revenue." If you struggle to write a topic sentence, check whether your paragraph expresses one main idea. If it doesn't, you may need to break your ideas into several paragraphs, each with its own topic sentence.
History is always written by the victors. The basic Tudor picture of Richard as a bloodthirsty tyrant was handed down through the standard histories of England and the school textbooks for five centuries. There has been an obstinate opposition, however. Beginning with Sir George Buck in the 17th century, a series of writers and historians have insisted that Richard was not getting a fair break, that the Tudor version was largely fabrication: far from being a monster, Richard was a noble, upright, courageous, tenderhearted and most conscientious king. This anti-Tudor version reached its definitive statement in the work of Sir Clements Markham, a 19th-century eccentric who spent years of passionate research trying to prove that crimes attributed to Richard were either outright libels by, or the actual work of, a pack of villains, most notably including Cardinal Morton and Henry VII.
The second way one uses the word "thesis" is in reference to a major paper that one writes as a capstone for his or her bachelor's or master's degree. Whereas term papers are projects that last one term, theses are projects that last several terms. Theses are usually much, much longer than term papers, often stretching past two hundred pages. Perhaps counterintuitively, however, theses often cover much more specialized topics than term papers. For example, one may write a term paper on Herman Melville for a literature survey course, but one would be much more likely to write a thesis on homosexual symbolism in Herman Melville's Moby Dick or on some other extremely specific aspect of one of Melville's novels. In fact, one could write an entire thesis on a single paragraph of Moby Dick . The goal of a thesis is to expound fully one's opinion on a given subject and to confront and exhaust all the opposition to that opinion. Therefore, one usually specializes his or her thesis topic almost to the point of absurdity.