Identify the correct answer based on the following statements:

Statement 1: The concept of a welfare state emerged as a response to the challenges posed by industrialization and economic inequality.

Statement 2: Post-colonial states often experience difficulties in establishing effective governance structures due to the historical impact of colonization.

Statement 3: Globalization tends to erode the autonomy of nation-states, diminishing their ability to control economic and political affairs independently.

Statement 4: In the context of nation-states, nationalism can both foster a sense of unity and contribute to conflicts with other nations.