| 1933-1945: |  | | | Franklin D Roosevelt president of US from before birth until age 1 |
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| 1936-1952: | | | | Reign of King George VI (Windsor) from before birth until age 8 |
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| 1937-1945: | | | | Chinese-Japanese war (3) from before birth until age 1 |
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| 1939-1945: | | | | World War II from before birth until age 1 |
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| 1941-1945: | | | | Manhattan Project from before birth until age 1 |
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| 1945: | | | | United Nations formed at age 1 |
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| 1945: | | | | US drops the bomb on Hiroshima and Nagasaki at age 1 |
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| 1945-1952: | | | | Harry S Truman president of US from age 1 to age 8 |
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| 1945: | |
| 1946: | |
| 1946-1989: | | | | The Cold War from age 2 until after line end |
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| 1947: | | | | Half-brother Asa is born at age 3 |
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| 1947: | | | | UN partitions Palestine to Jewish and Arab sections at age 3 |
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| 1947: | |
| 1947: | | | | India and Pakistan emerge from ex-British India at age 3 |
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| 1948: | | | | Half-brother Asa dies at age 4 |
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| 1948: | | | | Arabs attack Israel on the day it is inaugurated at age 4 |
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| 1948: | | | | Israel inaugurated as state at age 4 |
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| 1948: | | | | 33 1/3 rpm musical recordings at age 4 |
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| 1948: | |
| 1949: | | | | Apartheid policy in South Africa at age 5 |
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| 1949: | | | | Soviets detonate first nuclear bomb at age 5 |
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| 1949: | | | | 45 rpm musical recordings at age 5 |
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| 1950-1953: | | | | Korean War from age 6 to age 9 |
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| 1950-1954: | | | | McCarthyism from age 6 to age 10 |
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| 1950: | | | | Bunche 1st black to win Nobel Peace Prize at age 6 |
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| 1950: | | | | World pop. est. at 2.4 billion at age 6 |
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| 1951: | | | | Electricity from Atomic Power at age 7 |
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| 1952: | | | | 1st Thermonuclear Device Detonated at age 8 |
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| 1952-2050: | | | | Reign of Queen Elizabeth II (Windsor) from age 8 until after line end |
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| 1953-1960: | | | | Dwight D Eisenhower president of US from age 9 to age 16 |
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| 1954: | | | | Half sister Elizabeth is born at age 10 |
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| 1954: | | | | Racial segregation in schools ruled unconstitutional at age 10 |
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| 1955: | | | | Invention of Velcro at age 11 |
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| 1955: | |
| 1955: | | | | Warsaw pact formed at age 11 |
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| 1955: | | | | Introduction of Salk Polio Vaccine at age 11 |
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| 1955: | | | | Fiber Optics (by Kapany) at age 11 |
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| 1956: | | | | Ocean liner Andrea Doria collides with the Stockholm, sinks at age 12 |
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| 1956: | | | | Half brother Charles Benjamin is born at age 12 |
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| 1957: | | | | Sputnik Launched - 1st (artificial) satellite at age 13 |
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| 1958: | | | | US space agency (NASA) established at age 14 |
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| 1958: | | | | FM Stereo Broadcasts at age 14 |
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| 1958: | | | | Integrated Circuit at age 14 |
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| 1958: | | | | Stereo LP recordings come into usage at age 14 |
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| 1959: | | | | Hawaii enters the union - 50th at age 15 |
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| 1959: | | | | Alaska enters the union - 49th at age 15 |
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| 1959: | | | | 1st nuclear powered merchant vessel, Savannah at age 15 |
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| 1960: | | | | World subsurface circumnavigation by US sub Triton at age 16 |
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| 1960: | | | | 1st weather satellite (Tiros I) at age 16 |
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| 1960: | |
| 1960: | |
| 1961-1970: | | | | 7th Cholera pandemic from age 17 to age 26 |
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| 1961: | | | | 1st US manned spaceflight - Alan Shephard at age 17 |
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| 1961-1963: | | | | John F Kennedy president of US from age 17 to age 19 |
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| 1961: | | | | First human in space - Yuri Gagarin at age 17 |
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| 1962-1965: | | | | Vatican II from age 18 to age 21 |
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| 1962: | | | | Cuban missile crisis at age 18 |
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| 1963: | | | | Compact Cassette Recordings at age 19 |
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| 1963-1968: | | | | Lyndon B Johnson president of US from age 19 to age 24 |
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| 1963: | | | | Pres. Kennedy Assassinated at age 19 |
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| 1963: | | | | 1st artificial heart at age 19 |
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| 1964: | | | | Mother divorces James Blish at age 20 |
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| 1964: | | | | US civil rights bill at age 20 |
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| 1964-1975: | | | | Vietnam War from age 20 to age 31 |
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| 1965: | | | | 1st spacewalks (US, USSR) at age 21 |
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| 1965: | | | | Blacks riot in Watts neighborhood, Los Angeles at age 21 |
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| 1966: | | | | 1st soft landings on moon (US, USSR) at age 22 |
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| 1966: | | | | 8-track tape players at age 22 |
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| 1967: | | | | 1st human heart transplant at age 23 |
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| 1967: | | | | Physicist John Wheeler coins the term Black Hole at age 23 |
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| 1967-1970: | | | | Nigerian civil war from age 23 to age 26 |
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| 1967: | | | | Marshall 1st black supreme court justice at age 23 |
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| 1967: | | | | Six day war: Israel-Arabs at age 23 |
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| 1968: | | | | Robert Kennedy assassinated at age 24 |
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| 1968: | | | | Martin Luther King assassinated at age 24 |
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| 1969: | | | | Moon Landing - Neil Armstrong and Buzz Aldrin at age 25 |
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| 1969-1974: | | | | Richard M. Nixon president of US from age 25 to age 30 |
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| 1969: | | | | Woodstock Music Festival at age 25 |
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| 1970: | |
| 1970: | |
| 1970: | | | | Son Steven Benjamin Ramsdell born at age 26 |
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| 1971: | | | | Pakistani civil war at age 27 |
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| 1971: | | | | Intel ships 1st uProcessor: the 4004 at age 27 |
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| 1973: | | | | October war (Israel-Arabic nations) at age 29 |
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| 1973: | |
| 1974-1976: | | | | Gerald Ford president of US from age 30 to age 32 |
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| 1974: | | | | Pres. Nixon resigns in disgrace at age 30 |
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| 1975: | | | | Byte Magazine, issue #1 - September at age 31 |
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| 1975: | | | | The 1st home computer: The Altair 8800a at age 31 |
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| 1975: | | | | Ebola virus appears - 90 percent lethal at age 31 |
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| 1976: | | | | Whites accept principle of black majority rule in S. Africa at age 32 |
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| 1976: | | | | VHS Video Recordings at age 32 |
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| 1976: | | | | Television begins satellite delivery at age 32 |
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| 1976: | | | | American Bicentennial at age 32 |
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| 1977: | |
| 1977-1980: | | | | James Earl Carter Jr president of US from age 33 to age 36 |
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| 1978: | | | | 1st test-tube baby at age 34 |
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| 1978: | | | | Jonestown religious group mass suicide - 913 people die at age 34 |
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| 1978: | | | | Laserdisc video recordings at age 34 |
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| 1979: | | | | Margaret Thatcher 1st Woman Prime Minister in UK at age 35 |
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| 1979: | | | | Three Mile Island nuclear event at age 35 |
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| 1980: | | | | Mount St. Helens Erupts at age 36 |
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| 1981: | |
| 1981-1988: | | | | Ronald Reagan president of US from age 37 until after line end |
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| 1981: | | | | 1st space shuttle flight - Columbia at age 37 |
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| 1981: | | | | 1st female supreme court justice at age 37 |
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| 1982: | | | | 1st genetically engineered product - insulin at age 38 |
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| 1983: | |
| 1983: | | | | Bluford 1st black in space at age 39 |
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| 1983: | | | | Pioneer 10 leaves the solar system at age 39 |
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| 1984: | | | | HIV determined to be cause of AIDs at age 40 |
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| 1984: | | | | Apple Macintosh Ships at age 40 |
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