Why go to university? [Toefl Writing Skill Essay]

I strongly believe that everyone should go to university. Centuries ago most of people were learning professions and rudimentary social skills in their families and they didn't go to some kind of (this makes it less informal) institutions to build up improve/develop (build up means that something is accumulating, typically something undesireable) their abilities to reach obtain welfare [1]. But (traditionally we are taught not to start sentences with conjunctions such as "But", although nowadays it's fairly common and more acceptable. Just wanted to make you aware :) ) in our modern age, I think people should attend university for three main reasons: first to responsed to the intrinsic (intrinsic to what? it's a bit vague. Alternative word could be "innate".) need (or "desire") to get educated.; second, to get better jobs and third to get be able to have more impact on the universe.
In my opinion we've been created with a courage to learn facts inside (inside what? Do you mean "thoroughly"? In that case "to study" might be better than "to learn"). So studying at a university could be a suitable period for people to learn about topics they might be interested in. Also, universityies (since you are referring to universities as a collective, could also use "a university") provides a basic education that helps you find a basic view in on general topics such as how to socialized faster and easier, how to have a good family, etc. Furthermore, universityies tries try to educate you in the major you have selected to study by planning syllabuses syllabi, holding classes, and workshops, and so on. Thus we can say that universityies helps people to get a better worldview that may satisfy their need to get educated.
Moreover, in most of developed and developing countries, people seek progress and constantly try to improve their quality of life. For example, better cars, larger properties and more travels in a year (this sentence lacks a verb. "They wish for better cars, larger properties..."). You can achieve these goals if you have a good income. Now, the most desirable, safe and well-paid job careers needs educated people with high university degrees. The higher degree you have had, you are the more likely you are to get relatively better jobs than when you have a lower degree. Thus, it is more feasible to reach obtain welfare in life when if you went go to university.
About the last reason  (what was it again? I already forgot. It might be beneficial to state it explicitly rather than referring far back in your essay like this), I think the people who has have gone to university are friendly with books, able to think in a good structure (we don't really think in a structure. Maybe "able to think in an organised way") and have learned to analyze problems, issues or events and develop their own opinion on or to provide solutions for them (this is a pretty long and complex sentence!). History shows that people who had such characteristics were nearly often the most important people during their life or after that of their time (...if I understood you correctly). You could agree or disagree with them, but the only thing that you can't (or "shouldn't"?) do is to ignore them. Therefore, people can be impressive and be more effective on their environment (sorry I don't understand this part) when they have academic experiences.
So, by the given for these reasons I would like to say conclude that I think people should attend university to have better lives, better well-paid and enjoyable jobs and become more involved in the society, and from a much bigger point of view, to have more impact on the universe.

---

[1] If I was really nitpicking, this should be "ability to obtain welfare" or "abilities/skills in order to obtain welfare", do you see the difference? (Hint: the role of the word ability changes slightly)