Identify the correct answer based on the following statements:

Statement 1: According to classical liberal theory, the state's primary role is to safeguard individual liberties and protect private property rights.

Statement 2: Marxist theories contend that the state serves as a tool to maintain the dominance of the ruling class and perpetuate class struggle.

Statement 3: Social democrats advocate for a mixed economy where the state intervenes to address social inequalities while preserving a market-based system.

Statement 4: Anarcho-capitalists argue for the complete abolition of the state, relying on voluntary agreements and private institutions for societal organization.