Abstract: In The Principles of Psychology (1890), William James describes consciousness as a “stream”- a continuous, dynamic process that facilitates the perception of the environment. In“Why Consciousness?”, Robert Aumann (2024) argues that consciousness evolved to enable the experience of incentives underpinning all economic decision making, while leaving open the question of “How” Our answer to this question, built on brain plasticity at the synaptic level, delivers a measure of experiential consciousness in terms of the brain's information capacity (BIC). The resulting relation between BIC and the evolution of cephalized animals from C. Elegans (302 neurons; 7000 synapses) to humans (86 billion neurons, hundreds of trillions of synapses) motivates our definition of intelligence in terms of the organism's ability to make quality decisions to attain goals, i.e., survival of the smartest. Observe that goal intelligence (GI) differentiates biological intelligence (incentivized to attain goals through decision making) from AI (which fulfills goals algorithmically). GI is naturally applicable to research in economics, business, and social sciences in general, where decision quality has a pivotal role.