This article investigates the development of social democracy in Thailand from the 1932 Revolution (that gave birth to democracy) up the youth movement of 2020-2021. It is divided into four sections.

The first part will explore how social democracy formed in Thailand and how it has shaped power relations at different periods in history.

The second part will show how social democratic policy affects people's lives and how its major elements differ from liberal and conservative policies.

The third part will exhibit the contesting policies from various groups in Thailand.

And the fourth part will examine the recent conflict between the neoliberal authoritarian regime and the social democratic youth movement.