This concluding chapter highlights eight themes in the history of environmental economics, including the rise of the consumer, the changing definition of econmics, measurement and objectivity, the quest to measure the intangible, theories of surplus value, the relationship between pure and applied science, economic institutions including common property, and economics relationship to politics. It also points the way ahead to three areas where pricing the environment may be extended to new levels, areas that reflect these themes. The areas include the expansion of benefit-cost analysis to account for equity, the expansion of national income accounts like GDP to account for natural capital, and the international pricing of greenhouse gases.