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How To Write An Essay Introduction Thesis Statement

Getting started can often be difficult. Even professional writers say that the hardest part of writing is the beginning. Writing an introduction to an essay can therefore seem a daunting task, though it need not be so difficult, as long as you understand the purpose and the structure of the introduction. An example essay has been given to help you understand both of these, and there is a checklist at the end which you can use for editing your introduction.


Purpose of the introduction

When writing an introduction to an academic essay, it is useful to remember the main purpose of the introduction. In general, the introduction will introduce the topic to the reader by stating what the topic is and giving some general background information. This will help the reader to understand what you are writing about, and show why the topic is important. The introduction should also give the overall plan of the essay.


In short, the main purpose of the introduction is to:


This last purpose is perhaps the most important, and is the reason why many writers choose to write the introduction last, after they have written the main body, because they need to know what the essay will contain before they can give a clear plan.

Structure of the introduction

Although essays vary in length and content, most essays will have the same overall structure, including the introduction. The structure is related to the purpose mentioned above. The introduction to an essay should have the following two parts:


General statements

The general statements will introduce the topic of the essay and give background information. The background information for a short essay will generally just be one or two sentences. The general statements should become more and more specific as the introduction progresses, leading the reader into the essay (some writers talk about "attracting the readers' attention", though for an academic essay, this is less important). For longer essays, the general statements could include one or more definitions, or could classify the topic, and may cover more than one paragraph.


The following is an example of background statements for a short essay (given below):


Although they were invented almost a hundred years ago, for decades cars were only owned by the rich. Since the 60s and 70s they have become increasingly affordable, and now most families in developed nations, and a growing number in developing countries, own a car.


These sentences introduce the topic of the essay (cars) and give some background to this topic (situation in the past, the situation now). These sentences lead nicely into the thesis statement (see below).


Thesis statement

The thesis statement is the most important part of the introduction. It gives the reader clear information about the content of the essay, which will help them to understand the essay more easily. The thesis states the specific topic, and often lists the main (controlling) ideas that will be discussed in the main body. It may also indicate how the essay will be organised, e.g. in chronological order, order of importance, advantages/disadvantages, cause/effect. It is usually at the end of the introduction, and is usually (but not always) one sentence long.


In short, the thesis statement:


Here is an example of a thesis statement with no subtopics mentioned:


While cars have undoubted advantages, they also have significant drawbacks.


This thesis statement tells us the specific topic of the essay (advantages and disadvantages of cars) and the method of organisation (advantages should come first, disadvantages second). It is, however, quite general, and may have been written before the writer had completed the essay.


In the following thesis statement, the subtopics are named:


While cars have undoubted advantages, of which their convenience is the most apparent, they have significant drawbacks, most notably pollution and traffic problems.


This thesis gives us more detail, telling us not just the topic (advantages and disadvantages of cars) and the method of organisation (advantages first, disadvantages second), but also tells us the main ideas in the essay (convenience, pollution, traffic problems). This essay will probably have three paragraphs in the main body.



Example essay

Below is a discussion essay which looks at the advantages and disadvantages of car ownership. This essay is used throughout the essay writing section to help you understand different aspects of essay writing. Here it focuses on the thesis statement and general statements of the introduction (mentioned on this page), topic sentences, controlling ideas, and the summary and final comment of the conclusion. Click on the different areas (in the shaded boxes to the right) to highlight the different structural aspects in this essay.


General
statements

   

Thesis
statement

                     

Topic
sentences

   

Controlling ideas

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1

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Summary

   

Final
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Although they were invented almost a hundred years ago, for decades cars were only owned by the rich. Since the 60s and 70s they have become increasingly affordable, and now most families in developed nations, and a growing number in developing countries, own a car. While cars have undoubted advantages, of which their convenience is the most apparent, they have significant drawbacks, most notably pollution and traffic problems.

The most striking advantage of the car is its convenience. When travelling long distance, there may be only one choice of bus or train per day, which may be at an unsuitable time. The car, however, allows people to travel at any time they wish, and to almost any destination they choose.

Despite this advantage, cars have many significant disadvantages, the most important of which is the pollution they cause. Almost all cars run either on petrol or diesel fuel, both of which are fossil fuels. Burning these fuels causes the car to emit serious pollutants, such as carbon dioxide, carbon monoxide, and nitrous oxide. Not only are these gases harmful for health, causing respiratory disease and other illnesses, they also contribute to global warming, an increasing problem in the modern world. According to the Union of Concerned Scientists (2013), transportation in the US accounts for 30% of all carbon dioxide production in that country, with 60% of these emissions coming from cars and small trucks. In short, pollution is a major drawback of cars.

A further disadvantage is the traffic problems that they cause in many cities and towns of the world. While car ownership is increasing in almost all countries of the world, especially in developing countries, the amount of available roadway in cities is not increasing at an equal pace. This can lead to traffic congestion, in particular during the morning and evening rush hour. In some cities, this congestion can be severe, and delays of several hours can be a common occurrence. Such congestion can also affect those people who travel out of cities at the weekend. Spending hours sitting in an idle car means that this form of transport can in fact be less convenient than trains or aeroplanes or other forms of public transport.

In conclusion, while the car is advantageous for its convenience, it has some important disadvantages, in particular the pollution it causes and the rise of traffic jams. If countries can invest in the development of technology for green fuels, and if car owners can think of alternatives such as car sharing, then some of these problems can be lessened.


Union of Concerned Scientists (2013). Car Emissions and Global Warming.www.ucsusa.org/clean vehicles/why-clean-cars/global-warming/ (Access date: 8 August, 2013)

General
statements

 

Thesis
statement

 

Topic
sentences

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Controlling ideas

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Summary

 

Final
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Checklist

Below is a checklist for an essay introduction. Use it to check your own writing, or get a peer (another student) to help you.


ItemOK?Comment
The essay begins with general statements, which introduce the topic
The introduction ends with a thesis statement
The thesis shows the main ideas of the essay
The thesis shows how the essay will be organised (e.g. chronological, compare/contrast, advantages/disadvantages)


Next section

Find out how to structure the main body of an essay in the next section.




Previous section

Go back to the previous section about essay structure.






Introductions

In order for the first paragraph of an essay to actually be a proper introduction (in other words, for it to fulfill the requirements of a proper introduction), it must do two things. These two things are:

1) Include a thesis statement.
2) Provide a preview or essay plan for the essay.

So what do these two things mean?

1) A thesis statement is the sentence (or sometimes sentences) that tells the reader what the position of the author is. When you are given an essay question, the thesis statement is your clear and concise answer to the question. For example, if an essay question was ‘What were the causes of the Holocaust in World War II?’ then your thesis statement would be something like ‘There were many complicated and inter-related causes for the Holocaust, including the economy of Germany, the ideology of the fascists, and Hitler’s personal racism.’

A ‘thesis’ is an ‘argument’, so the thesis statement indicates what the argument of the essay is, or what argument (or point of view) the author of the essay will be putting across to readers.

2) An introduction must introduce all the main points that the essay will discuss. Argumentative essays must provide evidence in order to back up or support the thesis statement. This means you have to provide proof to back up your answer to the essay question. So if your essay is on the causes of the Holocaust, and your essay is going to discuss six main causes (two paragraphs on each), then your introduction must list (or introduce) each of these six main causes. So an essay map or preview is just a list of topics that your essay will discuss. Usually this list is linked to your thesis statement, or comes straight after it.


Topic Sentences

When writing an essay, you must use ‘topic sentences’. These are sentences that go at the beginning of each paragraph in which you are about to discuss a new topic. So in the example we have been looking at of the Holocaust essay, I mentioned that the essay will discuss six reasons for the Holocaust and each reason will have two paragraphs. So that means that every second paragraph would use a ‘topic sentence’ since it would be moving on to discuss another reason for the Holocaust. Here are some examples of topic sentences for the example essay:

‘The most significant cause for the Holocaust is the economic state of Germany.’
‘Another reason why the Holocaust occurred is due to Hitler’s personal views.’

These sentences let the reader know what the paragraph will discuss (what the next point to be discussed in the essay is) and also relate the paragraph back to the introduction. This gives the essay a nice flow, and shows that it has been well organised.

So, you can tell what the topic of the first body paragraph is by reading the topic sentence, which is the first sentence in the paragraph.


Concluding Sentences

A concluding sentence goes at the end of a paragraph or topic, and sums up for the readers what has just been discussed and relates it back to the question.

So if you had used the topic sentence ‘The most significant cause for the Holocaust is the economic state of Germany’ and then written a paragraph or several paragraphs discussing this topic, a concluding sentence could be: ‘Thus it can be seen that the economic state of Germany was the most important cause for the Holocaust.’

Topic sentences and concluding sentences go before and after your paragraphs like a sandwich, leading the reader through your essay.

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