Members of many primate species approach an opponent shortly after conflict and initiate behaviors such as embracing, grooming, or huddling—a phenomenon researchers call postconflict reconciliation. Existing research, however, suffers from several shortcomings. The variability between groups of the same species is rarely addressed; the majority of studies investigate only a small fraction of the pairings that exist in a given group; and almost all reports are restricted to animals in captivity.

In an attempt to address some of these shortcomings, Sommer et al. recently conducted a study of postconflict reconciliation in wild Hanuman langurs, a species of colobine monkey. They observed rates of postconflict reconciliation much lower than would be expected based on previous research, and found that over 80 percent of all pairings exhibited no postconflict affinity whatsoever. The rarity of friendly postconflict reunion in wild langurs draws attention to the possibility that conflicts are modulated through avoidance. The option of temporarily avoiding contact with opponents is not easily available to captive primates, and certainly not to the extent present in the wild. Still, studies of postconflict behavior of primates in captivity remain valuable: above all, they demonstrate the flexibility of nonhuman primates in various environments. It is likely, however, that the reported frequency of reconciliation among primates is artificially inflated by the conditions of captivity.

Many policymakers adopt a macro approach to environmental problems in emerging markets (countries experiencing rapid economic growth): discussing ambitious regulations in global faums and looking to giant multinational companies and non-governmental organizations (NGOs) for insight. But examining what successful companies in these countries are already doing to make growth more environmentally sustainable may make more sense.

One study identifies several such firms that are turning eco-consciousness into a source of competitive advantage. The most salient quality of these highly profitable companies Is that they turn limitations (of resources, labor, and Infrastructure) into opportunities. An Indian cement company suffering water shortages developed the world ' s most water-efficient cement-making method, using air-cooling rather than water cooling. A Philippines utility reduced its water loss through wastage and illegal tapping from 63 percent (1997) to 12 percent (2010) by making water more affordable for lower-Income consumers. A Chinese company makes air conditioners powered with buildings ' waste heat, reducing strain on the electric grid.

The companies also seek to shape their business environment to support sustainable objectives. Some lobby regulators: a Brazilian organic-sugar producer works with Brazil ' s government to establish an organic certification system. Some form partnerships: Kenya ' s Equity Bank allies with international groups to reduce its risks when lending to smallholders or single-family farms; a Brazilian cosmetics company works with suppliers to produce sustainable packaging. Some firms also work to reach and educate lower-income consumers, sacrificing short-term profits to create future markets: a Chilean forestry company organizes local carpenters into networks and connects them to low-income customers.

One could quibble with the study. Switzerland ' s Phil Rosenzweig has argued that management writers are prone to a halo effect: they treat a company ' s temporary success as proof that It has discovered some eternal principle of good management. That some successful companies have embraced environmental sustainability does not prove that It makes companies successful. Some firms, having prospered, can afford splurging on green Initiatives; some pursue eco-Initiatives for public relations purposes.

Nonetheless, the study Is thought-provoking. Critics argue that environmentalism Is a rich-world luxury, but such fears are overblown. When natural resources are scarce and consumers are cash-strapped, sustainability can be a lucrative business strategy.