Category Archives: natural selection

The origins and evolutionary effects of consciousness

From the Evolution Institute.

“How consciousness evolved and how consciousness has come to affect evolutionary processes are related issues. This is because biological consciousness–the only form of consciousness of which we are aware–is entailed by a particular, fairly sophisticated form of animal cognition, an open-ended ability to learn by association or, as we call it, ‘unlimited associative learning’ (UAL). Animals with UAL can assign value to novel, composite stimuli and action-sequences, remember them, and use what has been learned for subsequent (future), second-order, learning. In our work we argue that UAL is the evolutionary marker of minimal consciousness (of subjective experiencing) because if we reverse-engineer from this learning ability to the underlying system enabling it, this enabling system has all the properties and capacities that characterize consciousness. These include…” 

See the link for more.

The Third Way of evolutionary biology

Interesting website on this innovative exploration of the field. From the link:

“The vast majority of people believe that there are only two alternative ways to explain the origins of biological diversity. One way is Creationism that depends upon intervention by a divine Creator. That is clearly unscientific because it brings an arbitrary supernatural force into the evolution process. The commonly accepted alternative is Neo-Darwinism, which is clearly naturalistic science but ignores much contemporary molecular evidence and invokes a set of unsupported assumptions about the accidental nature of hereditary variation. Neo-Darwinism ignores important rapid evolutionary processes such as symbiogenesis, horizontal DNA transfer, action of mobile DNA and epigenetic modifications. Moreover, some Neo-Darwinists have elevated Natural Selection into a unique creative force that solves all the difficult evolutionary problems without a real empirical basis. Many scientists today see the need for a deeper and more complete exploration of all aspects of the evolutionary process.”

From ecology to brain development

The above is the title to a new, free Frontiers book subtitled “Bridging separate evolutionary paradigms.” I thought it would be of interest to this group. I can be found here, then scrolling down. From the Introduction:

“The nervous system is the product of biological evolution and is shaped by the interplay between extrinsic factors determining the ecology of animals, and by intrinsic processes that dictate the developmental rules that give rise to adult functional structures. This special topic is oriented to develop an integrative view from behavior and ecology to neurodevelopmental processes. We address questions such as how do sensory systems evolve according to ecological conditions? How do neural networks organize to generate adaptive behavior? How does cognition and brain connectivity evolve? What are the developmental mechanisms that give rise to functional adaptation? Accordingly, the book is divided in three sections, (i) Evolution of sensorimotor systems; (ii) Cognitive computations and neural circuits, and (iii) Development and brain evolution. We hope that this initiative will support an interdisciplinary program that addresses the nervous system as a unified organ, subject to both functional and developmental constraints, where the final outcome results of a compromise between different parameters rather than being the result of several single variables acting independently of each other.”

Neural Correlates of Post-Conventional Moral Reasoning

The abstract from this article:

“Going back to Kohlberg, moral development research affirms that people progress through different stages of moral reasoning as cognitive abilities mature. Individuals at a lower level of moral reasoning judge moral issues mainly based on self-interest (personal interests schema) or based on adherence to laws and rules (maintaining norms schema), whereas individuals at the post-conventional level judge moral issues based on deeper principles and shared ideals. However, the extent to which moral development is reflected in structural brain architecture remains unknown. To investigate this question, we used voxel-based morphometry and examined the brain structure in a sample of 67 Master of Business Administration (MBA) students. Subjects completed the Defining Issues Test (DIT-2) which measures moral development in terms of cognitive schema preference. Results demonstrate that subjects at the post-conventional level of moral reasoning were characterized by increased gray matter volume in the ventromedial prefrontal cortex and subgenual anterior cingulate cortex, compared with subjects at a lower level of moral reasoning. Our findings support an important role for both cognitive and emotional processes in moral reasoning and provide first evidence for individual differences in brain structure according to the stages of moral reasoning first proposed by Kohlberg decades ago.”

Looking for the metanarrative of our lives

Excellent article by David Lane. Therein he goes into Edelman’s primary and higher-order consciousness. While acknowledging that natural selection has no purpose it is indeed ironic that we humans, with our self-aware higher consciousness that creates purpose, ended up at the top of the selection process. The downside of the latter is that it is a double-edged sword; it can make up stories that serve the purpose of giving us comfort but not be true. However it also has the capacity via the scientific method to correct those stories with new insights and stories from empirical experiment, hence our superior ability to flourish. Nevertheless, the new stories are still based in natural selection versus supernatural causes. They are better, more accurate stories open to revision pending further evidence. And they are indeed the result of our higher-order consciousness.