RICHARD PIPES MARLBOROUGH, N. H. 03455 Tel. (603) 827-3487 August 4, 1968 Prof. Joshua Lederberg 500 Pasteur Drive Palo Alto, Calif. Dear Professor Lederberg: Whatever the semantic difference between "guilt" and "responsibility" (and I am not certain there is any) in daily usage the two terms mean the same. The theory of "collective responsibility" strikes me not only as being immoral and des- structive, but in the case of the murder of M. L. King as absurd. The only burden I can feel for that assassination is that, by having fa- vored and abetted the emancipation of Negroes in this country, I have contributed to the awa- kening of that ‘yacklash” of which King fell victim. If that proposition were true, then morality would dictate placating the racists. Yours sincerely, rete