Abderites (Greek: Σχολή των Αβδήρων) or the School of Abdera was a Pre-Socratic school of thought, founded in Abdera, Thrace around 440 to 430 BC. Its proponents, Leucippus and Democritus, were the earliest atomists. [1] Leucippus is believed to be the founder, and was born at either Abdera or Miletus. Democritus, his student, was native to Abdera.