No single sentence will pester you quite so much as the thesis sentence.Often you'll find it is both the first sentence you write and the last sentence you re-write while constructing your essay. Perhaps teachers make so much of the thesis statement because, if done correctly, it fills so many responsibilities.The thesis statement must assert your point, suggest your evidence, and structure your argument, all in one. If you can summarize your paper in one sentence, you're more likely to have a tightly-constructed, concise, and readable essay.
Perhaps you can narrow your interest into a statement like this: Many old wives' tales originated hundreds of years ago, yet some have been based on solid science and have led to real cures or medicines. It also asserts your view and provides an opening for evidence.
With solid research you can come up with several examples to support this statement.
In an argumentative essay, a thesis is a declarative sentence that takes a stance.
If you feel strongly about a social issue and you believe you can back it up, then go ahead and do it.
The next step is to narrow your topic into a single view or theory that you will explore and explain.
For instance, you may be very interested in the topic of old wives' tales.This is an interesting theme, but it is very broad.What is specifically interesting about wives' tales?Just be sure you back up your stance with facts and not opinions.Don't use cruel or insulting statements, just the facts. You may decide to take a stance, but you can't find facts or statistics to back up your argument.Be aware that there will always be someone who disagrees with your stance. If so, you might be on the right track, but you just need to focus a little more. You may find evidence that children who study music at a very young age tend to do well in math and science later in life.