what is economics

as one branch of the tree of knowledge is very large and spacious, economics given the title as the older art, and the newest science. economic problem has existed since humans first. no single branch older than him. there may be people who say that medical science will be foremost. It is less true,
because medical science was appearing after people feel ill.Science of painting, dance, etc, still require a very long time to appear on the human mind.we know that "there is effect there is reason"

dividing stages of human economic life as follows:

1. hunting and fishing
2. livestock
3. agriculture
4. agriculture and local industry
5. agriculture,industry and international commerce
 

It suggests to us that any solution of economic problems has been done by first person on this earth with hunting and fishing. but the economic terms there was not yet exist, even humans when it has not been thought necessary in the giving of term. economics born during the name is  economic . word economic comes from the Greek,it is oikos nomos.usually translated "management of house hold or estate".sure, the economic problems at that age is a matter of household economy. there is a man. his name is aristoteles (384-322 BC),he is a sociologist and psychologist.he is very smart man in our history.because this is Aristoteles so Greece has oikos nomos does not stop growing.his famous book is politika and etika nicomachea.among his book's most lots contain a description of  the basic theory of value and exchange, division of labor, interest rates, etc.but he often makes an oversimplification of the economic generality,because he life in the long time ago and rare to adventure.and now,the human in the world gave the title of Aristoteles as the first economist.