The Terra Prime Crisis and the Coalition of Planets

In 2155 Earth hosted talks with Vulcans, Andorians, Tellarites and other species on forming a Coalition of Planets. The project worried part of the human population, frightened by the growing influence of aliens. A xenophobic movement, Terra Prime, led by John Frederick Paxton, decided to strike.

Paxton's followers took control of a powerful array on Mars and threatened to fire it at Starfleet Command unless all non-humans left Earth. To show that species mixing was "unnatural", they had also created a child cloned from the DNA of T'Pol and Trip Tucker. Enterprise's crew infiltrated the base and stopped the attack, but the child, whom the two officers named Elizabeth, died from a genetic flaw.

In the aftermath, Archer gave a speech urging humanity not to turn inward and to work with its neighbours. The negotiations resumed, and the Coalition of Planets came into being, the first concrete step toward the founding of the United Federation of Planets in 2161.