Lookups spiked on April 10, 2012.
The word was often invoked on the 100th anniversary of the Titanic's departure from Southampton, England. For example, as The Guardian observed:
"Part of the enduring pull of the Titanic story is that it, yes, illustrates man's hubris to the point that the ship itself has become a cliched metaphor."
Hubris means "exaggerated pride or self-confidence" and comes directly from the Greek word with the same meaning.
Hubris is nearly always used in this context to refer to human ambitions and not, for example, to the specific actions of the Titanic's crew.