A mysterious letter

Noon. It's lunch time, time to get up and eat something. All my thoughts revolved around tomorrow's economics exam. There was little time and the lecturer was strict. So Sunday arrived on a beautiful spring day. I opened the window to listen to the singing of a lonely nightingale and suddenly... a paper airplane flew into my window. I wanted to launch it further into the air, but I saw that there was something written there. A mysterious letter, I thought and unfolded it. And indeed, not believing my eyes, there were answers to all my exam questions in economics tomorrow. Wow, I gasped and began to read with rapture.
I have to take the economy tomorrow
Today I will not sleep all night.
Has the economy ever been in the world?
What is the idea of this science gave birth?
Where, when and why
Wise men of the Ancient world conceived an eco-idea?
Maybe it's our whole life?
Confucius said:
"The ruler must limit his expenses and love people"
Truly great is the Teacher Kun,
Considered a true vice of a huge number of laws, -
The more of them in the world, the more crimes.
The phrase of a wise man who knows what the time wants is known:
"Man extends the path, not the path of man."
Ancient Greek thinker Xenophon
Introduced the concept of "economy" - "oikos", or "house";
In combination with the law "nomos-nomia"
Have received a word "SAVING".
"The supreme owner of the land is the state," -
Another wise man Plato said
In his treatises "The State" and "Law".
By the way, one my grandfather named Plato
Was called in honor of this wise man.
On the origin of money, their functions and the concept of "ECONOMY"
We learn in the writings of Aristotle.
This is, first of all, "Nicomachean Ethics" and "Politics".
Do you want to read them at leisure?
Later, in the XVI-XVII-th century,
The first scientific school was Mercantilism.
The economic theory "POLITICAL ECONOMY" was called by
Frenchman Antoine de Montchrestien,
Considered, like the Englishman Thomas Mun, -
Due to trade, you can put gold in your pocket.
In the era of industrial revolution
Learning about the market, Adam Smith opened the gate.
Political economy has become CLASSICAL.
Norm of profit, David Ricardo declared the capitalistic stimulus.
Added from himself Franзois Quesnay - a physiocrat,
That, developing agriculture,
You will become fabulously rich.
Eco-thought did not stand on the spot.
Evolution drived the science.
From the classical political were born
Marxism and neoclassicism.
The powerful work of Karl Marx "Capital"
Has essentially developed the science.
Neo-Marxists - Marginalists
Carl Menger and Eugen Bohm-Bawerk
Involved the subject in the eco-analysis,
Which refuted the old science.
Further business developed
Representative of Cambridge School
Neoclassic A. Marshall.
He gave a new term,
"ECONOMICS" called.
Century XX-th, year 30-th - in the economy collapse.
This analysis gave an oak.
Then another scientist appeared
By the name of John Keynes.
He wrote this,
If someone has not read,
I'll tell you a secret,
How to find this work:
"The General Theory of Employment, Interest and Money", 1936.
So!
His theory of effective demand
Will help in solving any issue.
"With it came the new day",
Said my grandfather-economist A.J.
Other directions of economic theory
I just call it without background:
American institutionalism,
Neoliberalism, monetarism and
Neoclassical synthesis of Samuelson
As a new universal doctrine on the problems of modern science,
Giving the key in the hands to society for prosperity.

I was so engrossed in reading and finishing reading the letter that I did not notice how my fellow student stopped and looked at me with wide eyes through the open window. He also has to take an exam tomorrow.
- How are the preparations going? He asked.
- There is little time left. I answered thoughtfully.
- Then what's your plan? Irina, you can't run forever. See you tomorrow at the exam, he winked and quickly disappeared.
“I’ll definitely be well prepared,” I thought and hurried to make strong coffee.