It introduces the reader to the idea that the essay will address.
It is also intended to capture the reader's attention and interest.
The word "thesis" just sounds intimidating to most students, but a thesis is actually quite simple.
A thesis statement (1) tells the reader what the essay is about and (2) what points you'll be making.
Whether you use a diagram or outline doesn't really matter.
Some people prefer and work better with the flowing structure of a diagram.The purpose of your essay is defined by the type of paper you're writing.There are three basic types of essay papers: Once you have defined the purpose of your essay, it's time to brainstorm. Take some time to consider, contrast and weight your options.Once you're done developing a thesis statement that supports the type of essay your writing and the purpose of the essay, you're ready to get started on your introduction.The introduction is the first paragraph of the essay.Creating a diagram or outline allows you to put pen to paper and start organizing your ideas.Don't worry or agonize over organization at this point, just create a moderately organized format for your information.You'll need to narrow down your topic to something like "Russian Politics: Past, Present and Future" or "Racial Diversity in the Former USSR". Or to education about a person, place, thing or idea?If you're expected to choose your own topic, then the first step is to define the purpose of your essay. The topic you choose needs to support the purpose of your essay.Get out a piece of paper and make a list of all the different topics that fit the purpose of your essay.Once they're all down on paper, start by eliminating those topics that are difficult or not as relevant as others topics.