All organisms vary. It is in the highest degree improbable…
““All organisms vary. It is in the highest degree improbable that any given variety should have exactly the same relations to surrounding conditions as the parent stock. In that case it is either better fitted (when the variation may be called useful), or worse fitted, to cope with them. If better, it will tend to supplant the parent stock; if worse, it will tend to be extinguished by the parent stock. If (as is hardly conceivable) the new variety is so perfectly adapted to the conditions that no improvement upon it is possible,—it will persist, because, though it does not cease to vary, the varieties will be inferior to itself. If, as is more probable, the new variety is by no means perfectly adapted to its conditions, but only fairly well adapted to them, it will persist, so long as none of the varieties which it throws off are better adapted than itself. On the other hand, as soon as it varies in a useful way, i.e. when the variation is such as to adapt it more perfectly to its conditions, the fresh variety will tend to supplant the former.””
About This Quote
This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.
Natural selection favors variations that improve fitness; useful traits spread while detrimental ones disappear.
In simple terms: Useful traits thrive, bad ones die.
Key Takeaway
Adapt and let beneficial changes lead.
Themes
evolution
adaptation
competition
survival
Mood
analytical
thoughtful
Type
scientific
philosophical
When to use this quote
- species divergence
- environmental change
- breeding programs
- conservation efforts
Key Concepts
natural selection
fitness
variation
Questions to Reflect On
- What traits in your work are truly beneficial?
- How do you identify useful versus harmful changes?
A Different Perspective
If variation is neutral, it may persist without clear advantage.