What is "kulakara"

In Jainism, kulakara (also manu) refers to the wise men who teach people how to perform the laborious activities for survival. According to Jain Cosmology, when the third ara of the avasarpani (present descending half-cycle of cosmic age) was nearing its end, felicities due to ten type of Kalpavriksha (wish fulfiling trees) started declining. The number of the sages who thus appeared is said to be fourteen, the last of whom was Nabhirai, the father of the first tirthankara, Rishabhanatha.