Design 21: Social Design Network

As an educator, I've used, and very much appreciated, sections from In the Bubble for continuing education students at UC Berkeley who are learning about the principles of sustainable design. What I often find is that after learning about the integral and wholistic nature of sustainability, students tend to focus very narrowly on more technical aspects of design. There seems to be something about the culture of this field that still encourages reductionist approaches, and prioritizes "objective" metrics. What insights do you have in your teachings and talks that can help designers maintain an integral perspective?