Economics is a constantly evolving field, with new theories and ideas being developed over time. In recent years, there has been a growing focus on issues such as inequality, sustainability, and the role of technology in the economy. Additionally, there has been a growing interest in behavioral economics, which incorporates insights from psychology into economic analysis. Additionally, new area of study like green economics, digital economics and more are been focus to understand the economic development with time.
I recommend reading a book on the history of economic thought! There are numerous of them. Just look on the internet.
Let me only add informations economics, Abdullah Mahmood
The information age will definitely change the basic paradigms of economics as discipline; but it seems to be that as the real economy changes by techno-know-logical innovation, the science of the body economic adapts with some time-lag. In this sense, be prepared for the new economics of the Information Age.
Freakonomics — the application of economic theory to diverse subjects outside the traditional remit of economics, e.g. to topics in sociology, criminology, or even primatology — is certainly a recent development.