individual (adj.) Look up individual at Dictionary.com
early 15c., "one and indivisible" (with reference to the Trinity), from Medieval Latin individualis, from Latin individuus "indivisible," from in- "not, opposite of" (see in- (1)) + dividuus "divisible," from dividere "divide" (see divide). Not common before c.1600 and the 15c. usage might be isolated. Sense of "single, separate" is 1610s; meaning "intended for one person" is from 1889.
individual (n.) Look up individual at Dictionary.com
"single object or thing," c.1600, from individual (adj.). Colloquial sense of "person" is attested from 1742.
A majority can never replace the individual. ... Just as a hundred fools do not make one wise man, a heroic decision is not likely to come from a hundred cowards. [Adolf Hitler, "Mein Kampf," 1933]
Latin individuum meant "an atom, indivisible particle;" in Middle English individuum was used in sense of "individual member of a species" from early 15c.