Which of the following best represents Adam Smith's view of government intervention in advancing public welfare?

1.Governments are responsible for intervening when it benefits the middle class.

2.Governments should let individuals pursue their own self-interests, and buy and sell whatever they wish.

3.Humans do not behave like rational economic creatures and must be forced into such behaviors.

4.Governments can influence a consumer's desire to save, thereby lowering aggregate demand.