How to establish a global authority to deal with academic plagiarism? In the vastness of today's academia, the "wrongful appropriation" and "stealing and publication" of another author's "language, thoughts, ideas, or expressions" and the representation of them as one's own original work prevails regardless of institutional measures to curb this kind of plagiarism.

If there were to exist a global authority to monitor journals and other publications for plagiarised material, it may benifit the academic and scientific community greatly.

We can keep a watch on material being plagiarised or uncredited. Then, blacklist authors who repeatedly steal other's works.
I am not sure how ethical it is to do so but it sounds just.

Does there already exist such a recognized global organization?

After I graduate, I seek to help academia by setting up an establishment that focuses solely on eliminating the plague of plagiarisation. Then, expanding it be a watchful protector for the entire academic world.

What is your advice for me? At this moment, this is simply an idea.
Even if I do set up a thing like this, how can I hope for it to be one day recognized by people like you?

I'm unsure of the process (toil) involved in setting up such a huge authority. I would ofcourse need expert academicians and scholars. Programmers and scientists to find detection algorithms. Hundreds, if not thousands, of people to go through material looking for similarities.

Do you have any idea how such an organization would function? I'm just day dreaming here.
I'll try to shed light on how a Russian group of this kind, Dissernet, works. They run full texts of the theses through their own homebrew plagiarism detection system and employ volunteers to examine possible cases of plagiarism and check the proper attribution of quotes. As their call for action describes, checking a single thesis requires:


obtaining a digital full-text version or OCR'ing a paper copy
running a plagiarism match
searching the Internet for possible sources of misappropriation
preparing a report on the results, filing it in the database and giving context to the results


Apart from that, running a society of volunteers requires:


running a server for reports and databases
paying for full-text theses access 
paying for OCRs and paper copies
paying for commercial plagiarism detection software to complement your own software
paying for legal professionals, mailing expenses, logistics and running the office


In three years from 2013 to 2016, they have produced around 1300 reports, making a living on community donations. At any given moment of time, they had 10 to 20 volunteers active. This might give you an idea for the scope of effort in these kinds of projects.