[jdege]

I re-read this, recently, having read it originally when I was in junior high.

I was astounded at the political naivety - the inherent presumption that the U.N.could grow to eliminate all human discord and conflict.

And then there’s the ESP stuff.

It doesn’t age well.

[sparklite2]

I read it as a teen, and unfortunately remember the ending.
Not that the ending’s bad, but the element of surprise might be gone. Nonetheless, my eyeballs will be on it.

[tbw2]

Larry Niven’s 1970s “Known Space” books and stories have the same presumption.