You are a zealot! and you are a zealot! and you are a zealot! and you are a zealot!—you're all zealots! #42

The number 42 is, in The Hitchhiker's Guide to the Galaxy by Douglas Adams, the "Answer to the Ultimate Question of Life, the Universe, and Everything", calculated by an enormous supercomputer named Deep Thought over a period of 7.5 million years. Unfortunately, no one knows what the question is. The Zealots were a political movement in 1st-century Second Temple Judaism which sought to incite the people of Judea Province to rebel against the Roman Empire and expel it from the Holy Land by force of arms, most notably during the First Jewish–Roman War. Fanaticism is a belief or behavior involving uncritical zeal or with an obsessive enthusiasm. Philosopher George Santayana defines fanaticism as "redoubling your effort when you have forgotten your aim". The fanatic displays very strict standards and little tolerance for contrary ideas or opinions. Extremism is "the quality or state of being extreme" or "the advocacy of extreme measures or views". The term is primarily used in a political or religious sense, to refer to an ideology that is considered to be far outside the mainstream attitudes of society. It can also be used in an economic context. Groupthink is a psychological phenomenon that occurs within a group of people in which the desire for harmony or conformity in the group results in an irrational or dysfunctional decision-making outcome. Dementia is a general term for loss of memory, language, problem-solving and other thinking abilities that are severe enough to interfere with daily life. An extinction-level event is a widespread and rapid decrease in the biodiversity on Earth. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms. It occurs when the rate of extinction increases with respect to the rate of speciation. Existential crisis, also known as existential dread, are moments when individuals question whether their lives have meaning, purpose, or value, and are negatively impacted by the contemplation. It may be commonly, but not necessarily, tied to depression or inevitably negative speculations on purpose in life.