A historical view to the means of power shows that the meaning of this word always changed during the centuries. we can divide historical periods of power in 5 parts.
During this period every thing depends on the physical power of humans and this power was the base of the abilities of mankind.
Before Middle Age and Middle Age:
every country with strong military was the strongest country.
The military force depends on the mechanical knowledge and war sciences.
After Middle age:
Who knew more, was the winner, and the knowledge plays the first role in human life.
1. The scientists make the knowledge.
2. Nobody can access the knowledge of other countries.
Then governments with more scientists were the strongest and always won the wars.
The knowledge makes the information and who has more information will make the best decisions and can use the opportunities.
But now...there are lots of information, there are lots of knowledge that every day makes more and more information, but the way you access these information and the way you classify and save them is more important than information itself. then we have a new kind of power, and it's INFORMATION TECHNOLOGY (IT). nowadays somebody who knows the way to find the proper information will be the winner and there is some devices that help you to access this abilities like computers and internet. because in new world you don't need to know more but "you need to find out what you need when you want". It's not important that who makes the information; it is important that you use the generated information.