It is generally thought that their name came from Zadok, who was the high priest under David, or possibly a later Zadok. The group by this name first appeared in the 2nd century BC and disappeared in the 1st century AD after the destruction of the temple in 70. There would be no need for temple priests if there were no temple.

According to Josephus as reported by the Harper's Dictionary of the Bible, "the Sadducees are said to reject the immortality of the soul, to attribute all human activity to free will and none to fate (or providence), and to reject other traditions, especially those of the Pharisees."

The article goes on to state:

The Sadducees were influential with only a few wealthy families and not with the people, who followed the Pharisees' interpretation of the law.... [they] were boorish in their social interactions,... they encouraged conflict with rather than respect for their teachers, were more stern than the Pharisees in recommending punishments for crimes, and ... aroused Herod's suspicions because they supported the Hasmoneans against him. From this data many commentators have surmised that the Sadducees were mostly priests and wealthy, powerful community leaders who sat in the Sanhedrin, were greatly hellenized (i.e., influenced by Greek culture), and cultivated good relationships with the Romans. [p. 891]