**Establishing the importance of the topic:
One of the most significant current discussions in legal and moral philosophy is ......
It is becoming increasingly difficult to ignore the .....
X is the leading cause of death in western industrialised countries.
X is a common disorder characterised by ......
X is an important component in the climate system, and plays a key role in Y.
In the new global economy, X has become a central issue for ......
In the history of development economics, X has been thought of as a key factor in .......
