 Husbands @-@ Hankin was instrumental in developing the concept of " Ethical Kashrut " , the idea that one should only purchase goods that are produced in an ethical way . His essay , " Ethical Kashrut , " was selected for publication in Arthur Kurzweil 's Best Jewish Writing 2003 . A singer , cello and guitar player , he composes and performs Jewish music . 
 Husbands @-@ Hankin was instrumental in developing the concept of " Ethical Kashrut " , the idea that one should only purchase goods <a href='null_relcl' title='1'><mark>that</mark></a>are produced in an ethical way . His essay , " Ethical Kashrut , " was selected for publication in Arthur Kurzweil <a href='null_genetive' title='2'><mark>'s</mark></a>Best Jewish Writing 2003 . A singer , cello and guitar player , he <a href='uninflect' title='3'><mark>composes</mark></a> and <a href='uninflect' title='4'><mark>performs</mark></a> Jewish music . 
Husbands @-@ Hankin was instrumental in developing da concept of " Ethical Kashrut " , the idea that one should only purchase goods are produced in an ethical way . His hw , " Ethical Kashrut , " was selected fir publication in Arthur Kurzweil  Best Jewish Writing 2003 . A singer , cello and guitar player , he compose and perform Jewish music .