I do not think you can call Iceland (#184 by population and #106 by area) and Belgium (#76 by population and #136 by area) large countries.
>> Centuries of development aren't necessary to achieve it, it's mostly political will.
While political will is important, it is not enough. It highly depends on geographical properties of the country. For example Iceland produces 85% of its energy from geothermal and hydropower sources and Brazil produces 83% of its electricity from hydropower. Both rely on naturally occurring phenomenons, not all countries are lucky enough to have them.
>> Centuries of development aren't necessary to achieve it, it's mostly political will.
While political will is important, it is not enough. It highly depends on geographical properties of the country. For example Iceland produces 85% of its energy from geothermal and hydropower sources and Brazil produces 83% of its electricity from hydropower. Both rely on naturally occurring phenomenons, not all countries are lucky enough to have them.