I would say alliances and nationalism because nationalism only encouraged countries to go to war and prove that they were the best most powerful country around and in terms of WWI, nationalism led to strong dedication to the army and just keep most countries in the war longer than they should have been in it. Alliances were significant in the exact beginning of the war and the scale to which the war was fought. The many (secret) alliances led to austria-hungary and Serbia to sorta threaten each other, which brought Germany in, then France, etc.
Answer: Graffiti artist
THIS IS NOT MY ANSWER THIS IS WIKIPEDIÀ
Explanation: Jean-Michel Basquiat was an American artist who rose to success during the 1980s as part of the Neo-expressionism movement. Basquiat first achieved fame as part of the graffiti duo SAMO, alongside Al Diaz, writing enigmatic epigrams in the cultural hotbed of Manhattan's Lower East Side during the late 1970s, where rap, punk, and street art coalesced into early hip-hop music culture. By the early 1980s, his paintings were being exhibited in galleries and museums internationally. At 21, Basquiat became the youngest artist to ever take part in documenta in Kassel. At 22, he was the youngest to exhibit at the Whitney Biennial in New York. The Whitney Museum of American Art held a retrospective of his art work in 1992. Basquiat's art focused on dichotomies such as wealth versus poverty, integration versus segregation, and inner versus outer experience.
FDR - he created the social security program, the New Deal, and many other social programs that we still have today
Oskar Groening, at 94, is one of a shrinking pool of former Nazi leaders
The Soviet government would remove missiles from Cuba if the United States agreed not to invade Cuba