The editorial ''A 21st Century UN,'' June 27, refers to the need of today's ''generation of leaders to work on reinventing the world organization to meet current needs,'' and for citizens to become enthusiastic about the reinventing.
A good question is, how can we become enthusiastic about reinventing the United Nations?
I believe, as millions of others do, that the fundamental spiritual truth of our age is ''the oneness of humanity.''
Political and spiritual leaders, scientists, artists, educators, and especially the media, should take it upon themselves to initiate and carry forward this global enterprise, unitedly and perseveringly.
Barnak Kusha Madison, Wis.
Your letters are welcome. For publication they must be signed and include your address and telephone number. Only a selection can be published and none acknowledged. Letters should be addressed to ''Readers Write'' and sent by mail to One Norway St., Boston, MA 02115, by fax to 617-450-2317, or by Internet E-mail (200 words maximum) to OPED@RACHEL.CSPS.COM.