What is the striven?
I strive to explain right now. Indeed, I am striving to explain. Yesterday, I strove to explain. In the past, I have striven to explain. If I keep this up for long enough, I will have striven to explain. The verb to strive means, basically, to try. If you noun the verb, an ancient practice that some purists hate despite the fact that we have always done it, the strivers are those who strive, and the striven could be those who have striven or who have been the object of striving. I have never heard the noun phrase "the striven" before.