Selfmodification

Self-modification is the capacity to alter one's own structure, function, or behavior. The term is used across disciplines to describe processes by which a system changes itself in response to internal goals or external stimuli. In biology, self-modification includes genetic editing and epigenetic changes that alter gene expression and trait manifestation. Somatic genetic edits modify an organism's body during its lifetime, while germline edits affect inherited traits. Natural self-modification occurs via mutation, selection, and epigenetic regulation, and is central to development and evolution. Ethical and safety concerns accompany deliberate genetic modification, especially in humans and other organisms.

In psychology and behavioral science, self-modification refers to deliberate changes in thoughts, habits, or skills, often pursued through strategies such as goal setting, habit formation, therapy, and neuroplasticity-based training. Cognitive self-modification may involve altering decision processes, biases, or mental models.

In computing, self-modification describes programs that alter their own code or behavior. Early self-modifying code exploited writable memory to optimize performance or adapt to environments; modern systems use self-adaptive or self-learning techniques, including meta-learning and evolving architectures. Such capabilities raise questions about reliability, security, and predictability, as well as governance over autonomous systems.

Overall, self-modification spans intentional redesign of one's biology, psychology, or software. It raises questions about control, ethics, and long-term consequences, balancing potential benefits such as adaptability and resilience with risks of instability, unintended effects, or loss of identity.