30% of the characteristics of ageing are due to one's genes, the remaining 70% are not. Successful ageing is aided by regular physical activity, continued social connections, resiliency to setbacks, and a feeling of control over one's life.
A US survey of adults revealed that 63% would prefer not to live to 100. The leading reason for their reluctance is a fear of being in poor health; a second reason, cited by 38% of the poll, is the fear of not having enough money.