The geography of Latin America, coupled with the fact that many of its countries were colonized, continues to hinder the development of the region.

The Korean Peninsula is an unstable region, because North Korea’s actions worry its neighbors such as China, Japan and South Korea.

These countries were British colonies and turned into regional rivals after achieving independence.

Australia and New Zealand are primary destinations for migrants who come from various small and poor countries from Oceania.

A state can only be recognized by others as such if it meets certain criteria and if others want to acknowledge it.

The 1992 Earth Summit adopted Agenda 21, the Rio Declaration and climate and biodiversity treaties.

Since the mid-twentieth century, there have been efforts to limit the spread of nuclear weapons, but existing arsenals remain.

International treaties create legal obligations among states, but these can be modified, suspended, or terminated.

International treaties must meet certain criteria to be valid; otherwise, they will be considered defective.