A wilder is a collective term in Robert Jordan's Wheel of Time series of novels for women who have learned to channel saidar on their own, without formal education or (usually) particular skill (though throughout the books Aes Sedai use it to describe any woman who learned to channel outside of the White Tower, regardless of whether they had been taught by others or not, most notability Sea Folk Windfinders, Aiel Wise Ones, and members of the Kin). It can be a derogatory term, especially when used by certain Aes Sedai who went to the White Tower to train, although at other times it is simply used as a descriptor. The term has not been used for men in living memory, as all men who can channel have been doomed to go insane from the taint on saidin, obviating any need for a formal instruction program.