Whilst I think that a nation should focus on looking after its own people, it should not come at the cost of our ability to work with other nations. It is possible both to prioritise improving the lives of the people of the nation and to cooperate with other nations on a global scale.

In fact it can be more beneficial to work with others to improve one's own nation to a greater degree than one could alone. The European Union is the primary example of this in that it creates a shared pool of investment which is used to provide funding for large schemes that benefit different member nations in ways that they could not do on their own.