Thinking that any human government on earth is "Unsinkable" is a foolish human notion just like the Titanic was

 We are now watching governments sink themselves one by one around the world by the selfishness and greed of their leaders.

This is likely to get much much worse because of two factors:

1. Global Climate changes increasing exponentially this century

2. Robots building robots of war and using them on people.

These two factors combined will likely end all useful governments on earth.

Why?

Because as people learn they cannot trust their governments those governments end one by one and not in pretty ways.