And? It's not a vote. Pick a person from the world out at random; it's a coin flip whether they live in a country that has or hasn't ratified Rome.

Considering China, India, and the US didn’t sign it, the odds are considerably in favour of not being in a country that ratified it.

I did a quick tally with my calculator and tallied up the population of each country above 10 million which isn’t among the 137 countries which are current signatories to the Rome Statute. My final tally was 4,6 billion which is around 57% of the world, leaving around 43% of the world population living in a country which is at least a signatory to the Rome Statute.

Non-signatories are overwhelmingly represented by a handful of countries with very large populations. None of the 5 most populated countries in the world are signatories, and out of the 10 most populated, only 4 are signatories (Nigeria, Brazil, Bangladesh, and Mexico). Out of the top 20 most populated countries, 10 are signatories.

Indonesia, Pakistan and Turkey have all previously expressed intentions of signing the Rome Statute, if only these countries would do so, it would bring over 60% of the world’s population under it.

>Neither is the US nor most countries in the World.

The standard semantics of ‘most countries’ counts countries, not the people in them. Of course the related claim that the majority of /people/ do not live in state parties to the Rome Statute has different truth conditions.