Why did historians think that gunpowder plot was a conspiracy?

Historians view the Gunpowder Plot of 1605 as a conspiracy because it involved a coordinated effort by a group of Catholic extremists, led by Guy Fawkes, to assassinate King James I and blow up the Houses of Parliament. The meticulous planning and secrecy required for such a plot, along with the involvement of multiple conspirators, indicate a deliberate collaboration rather than isolated actions. Additionally, the political and religious tensions of the time, particularly anti-Catholic sentiment, further support the idea that it was a conspiracy aimed at inciting a larger revolt against Protestant rule.