oP Or-the-basisofknowtedgewhiehistargely new- within the past During the past fifty years enormous strides have been made in lengthening the average life expectancy of individuals. Our rapid progress in this field has so pre-empted public and scientific attention that there is little awareness of the fact that virtually nothing has been accomplished in lessening senility or in lengthening the life span of the species. The increase of expectancy ~£ ane oo eter abe aeawe in wy OL per sons past Sinty has incréased only au it two yoars MUd dia the past one hundred years. The massive research programs that are now being mounted against cancer, stroke, and heart disease, both by governmental and private insvitutions, are yielding important results,and research on these specific diseases should be encouraged and sustained in every way. A study of mortality due to these diseases indicates, however, that their complete elimination would not greatly extend the average life expectancy or delay the occurrence of senility. On Pre hing Arn, Ran We prone f Ha ey fs sarc ef h Ayko, de agen he. ATE tral sax. decade, Cie Crien ger adi hee it el AO AE A. a f attain, "enough understanding Of the caus proces 6 fo sétard— tHe rate df aging in the human individual. The successful pursuit of such a project would lengthen the life span without lengthening the period of senility. In short, it may well be possible to increase the number of years of life which may be lived with comparatively youthful vigor. a La akoerd Ubon Ls itt ¢ Son as, Ke je BAe A mo Ra foe es tren te aR AEA coin Mer ° uch a AE eegeps gould be one of thé boldest and one of the most exciting scientific ondesvore ever undertaken. Present knowledge warrants support from scientists, the government, foundations, and others ona scale commensurate with the magnitude and urgency of the problem. Additional research, pursued with the proper emphasis and support, could result in benefits even to individuals now alive.