The Hawaiian Islands are actually the peaks of an long undersea volcano range.
For the last 32 million years the Pacific Plate has moved in a northwestern direction over the Hawai'i Hotspot in the seafloor.
The islands to the north are thus the oldest and have ceased volcanic activity long time ago. The Haleakala volcano on Maui is dormant and only the southernmost island, Hawai'i, still has some very active volcanoes incuding flowing lava.
Southeast from here a new island called Lo'ihi is in the making. Just wait another 10.000 years...

About 2000 years ago Polynesians from the Marquesas Islands started to settle the Hawaiian Islands and population grew steadily.
Captain Cook discovered the islands for Britain in 1778 but was killed by the locals after a fight at Kealakekua Bay in 1779.
Kamehamea the Great united the islands by force in 1810 and started the Kingdom of Hawai'i.
It was overtrown in 1893 with help of the USA which subsequently annexed the islands in 1898.
The Japanese  attack on Pearl Harbor in 1941 drove the USA into WW II and eventually Japan into defeat.
The Hawaiin Islands joined the USA as the 50th and sofar last state in 1959.
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