By any means, Vanuatu's second passport is the easiest and most advantageous dual citizenship to get.
The timeline for the whole process can take up to 2 months. The citizenship program is open to most nationalities. With a Vanuatu passport, you can travel visa-free to 125 countries, including the Schengen States, UK, Singapore and Hong Kong.
Vanuatu's citizenship program requires making an economic contribution to the country's Development Support Program (DSP).