Single career is an old fashion - 'being an expert in one specified sphere'

This essay is written in a 40 minutes, thank you for your help..) I managed to write only 250 words) as I couldn't catch up with time limit.

I tried to follow some tips you have given me in my previous essay
The idea of having a single career is becoming an old fashioned one. The new fashion will be to have several careers or ways of earning money and further education will be something that continues throughout life.

Throughout history, people have been satisfied by owning a single profession and being an expert in one specified sphere. Graduating from the university claimed to be sufficient to catch up with life. However, these attitudes seem to become extremely unreasonable in our modern world. Today, life requires having more than one profession and studying during the life of a person. I have to totally agree with this statement. Hence, the essay will give several reasons which support this.

Firstly, economic and political instabilities lead people to situations where changing the place and type of work is necessary. For example, economic recession in 2008-2009 was a cause of many discharges in different fields of work, and people without additional ways of making money were driven into bankruptcy. Political disturbances such as in Ukraine encourage people to immigrate to other countries where they have to find an unusual job for them. Therefore, owning different professions make it easier to find solutions in such situations.

Secondly, extremely developing world gives rise to new technologies and modes of life. For instance, the most significant technological and social progress, the Internet, which is claimed to be a symbol of freedom, have positively reversed the lives of many people in recent decades. Thus, if person wants to be aware of the latest changes, he or she needs to study in a long-term process throughout life.

In summary, nowadays it is common and sometimes necessary for people to be able to adapt for different conditions and variations.

Throughout history - In history
profession and studying during the life of a person - profession and also requires life long learning.
Please pardon me, I shall make more corrections later.

Throughout history, people have been satisfied by owning a single profession and being an expert in one specified sphere.specific area.
However, I find this idea as bit stereotype :( Even in ancient times there were people who did more than one profession. In my country the native doctors were also farmers. I feel you should be a little careful when you make general statements.

This is good, but let me give a few edits
World revolution affects nearly all aspects of a working life and development of technology timeline. Internet claimed as a symbol of freedom has positively changed the way people communicate with each other.

It is good if you leave one blank line between the paras to give a better presentation to your essay. When everything is together, your paragraphs are not clearly separated and that tends to distract the reader :)

Firstly, economic and political instabilities lead people to situations wherethat they need to changechanging the place and type of work is necessary . For example, economic recession in 2008-2009 was a cause caused many lay offs ] of many discharges in different fields of work, and people without additional ways of making money were driven into bankruptcy.

Thank all of you...I will take into account your advice