<unk>  has a significant impact on<unk> . People of different ages and gender tend to differ in many aspects, such as legal and social responsibilities, outlooks on life, and self-perceptions. Young people tend to have fewer legal privileges (if they are below the age of majority), they are more likely to push for political and social change, to develop and adopt new technologies, and to need education. Older people have different requirements from<unk>  and government, and frequently have differing values as well, such as for property and pension rights. Older people are also more likely to vote, and in many countries the young are forbidden from voting. Thus, the aged have comparatively more, or at least different, political influence. In different<unk> es, age may be viewed or treated differently. For example, age may be measured starting from conception or from birth, and starting at either age zero or age one. Transitions such as reaching puberty, age of majority, or retirement are often socially significant. The concepts of successful<unk>  and healthy<unk>  refer to both social and physical aspects of the<unk>  process.
Aging and society
Race and health
Obesity and the environment
Rural health
Digital media use and mental health
Epilepsy and employment
Diet and cancer
Sex and drugs