The paper by S. Zhang and Z. Li explores the interplay between spin-dependent conduction and magnetization dynamics in ferromagnets, focusing on the response of conduction electron spins to spatial and time-varying magnetization. They derive a linear response function for conduction electron spins and calculate the resulting spin torques on the magnetization. Four distinct spin torques are identified, with one being a novel torque that describes the mis-tracking between conduction electron spins and the spatially varying local moment. This torque is crucial for interpreting experimental data on domain wall motion. The authors show that the non-adiabatic torque, which is proportional to the current, controls the terminal velocity of the domain wall, while the adiabatic torque causes initial wall distortion. The study resolves a discrepancy between experimental observations and theoretical predictions, suggesting that the inclusion of the non-adiabatic torque is essential for accurately describing domain wall dynamics.The paper by S. Zhang and Z. Li explores the interplay between spin-dependent conduction and magnetization dynamics in ferromagnets, focusing on the response of conduction electron spins to spatial and time-varying magnetization. They derive a linear response function for conduction electron spins and calculate the resulting spin torques on the magnetization. Four distinct spin torques are identified, with one being a novel torque that describes the mis-tracking between conduction electron spins and the spatially varying local moment. This torque is crucial for interpreting experimental data on domain wall motion. The authors show that the non-adiabatic torque, which is proportional to the current, controls the terminal velocity of the domain wall, while the adiabatic torque causes initial wall distortion. The study resolves a discrepancy between experimental observations and theoretical predictions, suggesting that the inclusion of the non-adiabatic torque is essential for accurately describing domain wall dynamics.