The purpose of this archival research is to disentangle a complexity of energy transition process between 2001 and 2021, as a period when the ministry of energy was officially established to administrate energy matters in Thailand and the current report on energy transition index [ETI] from World Economic Forum was carried out. A particular attention is placed on the study of changing composition [structure] of energy supplies as a response to an increased demand on renewable energy over the last two decades: an interplay role between the policy makers, the institutional investors, the large energy firms and the public in general that has shaped a trajectory development of energy sector. This historical–institutional approach is epistemologically informed as history matters due to today’s and tomorrow’s choices are largely be shaped by the past.
Even more importantly, by understanding multiple pasts that gave rise to our conflict present can be useful for a future decision–making process. Hence, building upon an investigation into a series of past events on Thailand’s energy reform agenda and the analysis, a [re-] construct of narrative account shall contribute to a body of knowledge by revealing those obstacles and institutional inertia that have retarded a low – carbon transitions in Thailand as well as a transformative capacity of the involved parties that has helped [de-] locking and accelerating a transition process over the last two decades–long.
Key Words: Energy Transition Process, Archival Research, Historical Institutionalism and Institutional Change.