The discipline of geopolitics, though always interdisciplinary, when in synergy with the public governance and public policy field can generate relevant insights for the analysis of process and factors impacting the energy policies. Combining lenses of geopolitics, energetics, and public governance this PhD thesis aims to describe and explain dynamic and outcome of influence global actors had on the design of Croatian national energy policy in 21st century. To explain the process and outcome of the global actors’ influence, the thesis utilises qualitative approach based on process tracing analysis. Using numerous documents and key energy policy stakeholders as primary sources of evidence, the process tracing analysis identifies key actors and platforms used for the transfer of global energy ideas in Croatian energy policy environment. Theses, in addition, identifies and classifies tools used by actors to promote global energy ideas in the process of national deliberation on national energy policy as well as tools used to integrate those ideas in the content of policy document in stages of formulation and decision making on Croatian energy policy. Finally, thematic analysis of the content of adopted policy document has relieved explicit connection between global energy ideas promoted in the deliberation stage with the ideas encompassed by energy policy document. By unfolding the stages, and with them related actors and activities, through which global ideas have been transferred into current energy policy, the PhD proposes a process theory that can explain causal process through which global energy actors can produce impact on national energy policy in young democracies such is Croatia.