Genetic variation is the raw material of evolution. Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction.enetic variation is the raw material of evolution. Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction.
Both asceticism and monasticism have been adopted by worshipers of various faiths. In general, asceticism is the practice of strict self-denial as a means of attaining a higher spiritual plane. Monasticism is the state of being secluded from the world in order to fulfill religious vows.
Historically, there have been two main categories of asceticism: Otherworldly asceticism is practiced by people, including monks, yogis and hermits, who withdraw from the world in order to live an ascetic life; famous examples include St. Paul the Hermit, St. Anthony the Great, and St. Francis of Assisi.