Liberalism means running the government to promote individual liberty and freedom, along with providing social programs, notably a Welfare state to promote economicequality opportunity and economic security. Therefore, it's what works the best. Many different theories and ideas are included in liberalism, but Liberalism accepts change as inevitable, and we do not expect that tomorrow's liberal government will be the same as today's any more than today's is the same as yesterdays. In the United States, any number of Social democrat ideas such as Universal health care are considered liberal