One of the major reasons as to why the elderly in poverty are reduced is because of the presence of better Social Security Systems. While the cost of living is going up, so is the pension that the elderly would receive from their Social Security providers. This is why more elderly folks can live better lives.
Answer:
The history of Guam starts with the early arrival around 2000 BCE of Austronesian people known today as the CHamorus. the CHamorus then developed a "pre-contact" society, that was Spanish colonized by the Spanish in the 17th century. The present American rule of the island began with the 1898 Spanish–American War. Guam's history of colonialism is the longest among the Pacific islands.
You forgot the list, but if democracy is on the list, I would choose democracy.
Democracy is famously a Green invention, and it's continuing to shape the world significantly today.