<human>:  What are the most significant events in the last 100 years?
<bot>: Some of the most significant events in the last 100 years include the establishment of the United Nations (1945), the end of World War II (1945), the birth of the modern civil rights movement (1955), the moon landing (1969), the fall of the Berlin Wall (1989), the end of the Cold War (1991), the advent of the internet (1990s), the September 11th attacks (2001), the legalization of same-sex marriage (2015), and the election of the first African-American president, Barack Obama (2008).