The conclusion of a text plays a major role, since it is the last thing the writer says. An excellent text overall can be entirely ruined by a mediocre conclusion.
Among its possible functions are: summarizing and emphasizing a point in the text, making an appeal, giving suggestions, provoking critical thinking, etc.
Below, there is a simple exercise. You must replace what is written in bold with a similar word or expression, such as "in short".
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To summarize: low-income countries are much more developed than most people think. And vastly fewer people live in them. The idea of a divided world with a majority stuck in misery and deprivation is an illusion. A complete misconception. Simply wrong.
(Factfulness: Ten Reasons We’re Wrong About the World – and Why Things Are Better Than You Think by Hans Rosling with Ola Rosling and Anna Rosling Rönnlund)
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Here is a list with some of the possible answers. Remember, though, that there are countless other correct ways of doing this exercise. These are just a few of the right answers I picked off the top of my head.
To sum up, low-income countries are much more developed than most people think. (...)
On the whole, low-income countries are much more developed than most people think. (...)
Ultimately, low-income countries are much more developed than most people think. (...)
In summary, low-income countries are much more developed than most people think. (...)
Altogether, low-income countries are much more developed than most people think. (...)
In the final analysis, low-income countries are much more developed than most people think. (...)
All things considered, low-income countries are much more developed than most people think. (...)
Given these points, low-income countries are much more developed than most people think. (...)
In a nutshell, low-income countries are much more developed than most people think. (...)
Simply put, low-income countries are much more developed than most people think. (...)
Briefly, low-income countries are much more developed than most people think. (...)
In conclusion, low-income countries are much more developed than most people think. (...)
To conclude, low-income countries are much more developed than most people think. (...)
In view of these facts, we can reasonably conclude that low-income countries are much more developed than most people think. (...)