fifth

According to Wikipedia, a fifth columnist is “any group of people who undermine a larger group from within, usually in favour of an enemy group or nation. The activities of a fifth columnist can be overt or clandestine. Forces gathered in secret can mobilize openly to assist an external attack. Clandestine fifth column activities can involve acts of sabotage, disinformation, or espionage executed within defense lines by secret sympathizers with an external force.”

Literarily, it refers topersons who willfully constitute clogs in the wheel of progress within the system for no justifiable cause. Simply put, self-centered persons who allow selfish