The world's children comprise: (i) those in wealthy, industrialized co
untries; (ii) those from rapidly industrializing countries; (iii) mino
rity groups including recently arrived immigrants in otherwise affluen
t and healthy societies; (iv) previously traditional people in rapid t
ransition to urbanized, Western lifestyles; and (V) many millions livi
ng in grinding poverty in overcrowded, unhygienic conditions where chi
ld mortality is high and often due to malnutrition and infections. Ind
ustrialization, affluence, better housing, hygiene and nutrition, bett
er clinical care and disease prevention have helped enhance child heal
th in many countries over the past century. However, this is being off
set by obesity, smoking, alcohol and drug abuse and social disruption,
mental disease and high rates of violence including homicide and suic
ide. These 'new morbidities' are worse among minorities and in populat
ions undergoing rapid social change. Social pressures including unempl
oyment, depression and family dysfunction are important. Pediatricians
must become active in decisions about the use of public resources in
disease prevention, health education and more rational and equitable u
se of high technology. They should also be active advocates for childr
en and their rights acid advise governments about all issues that affe
ct child health, protection and well-being. This is particularly so in
the poorest and developing countries. There is a need for better inte
rnational collaboration, training and exchange programs involving the
International Pediatric Association, United Nations International Chil
dren's Emergency Fund, World Health Organization and other local, nati
onal and regional organizations to help overcome these problems as the
next century draws near.