the contract. Without this participation, tropical biology will be nothing but low-grade and gradually diminishing restoration ecology. The conservation community has valiantly propped up the fortress walls, but they are too few. The future lies in the children, but we cannot wait for a well-educated cohort to replace its parents. The tropical dry forest is a living classroom, and its students are its neighbors. The collective power to turn the game around resides with policy makers. We cannot force the world to conserve tropical nature; we must seduce it, and the bait is intellectual mutualism—not the dollar value of a caterpillar.


The people of Costa Rica have inspired me to believe there is still a chance. U.S. tax dollars through the National Science Foundation have financed the acquisition of the knowledge to see the chance, and the academic community has given the peer approval to know that this is the right direction. I thank P.Raven, W.Hallwachs, P.May, and A.Ugalde for help with the manuscript.


Hartshorn, G.S. 1983. Plants. Pp. 118–157 in D.H.Janzen, ed. Costa Rican Natural History. University of Chicago Press, Chicago.

Janzen, D.H. 1966. Coevolution of mutualism between ants and acacias in Central America. Evolution 20:249–275.

Janzen, D.H. 1967. Synchronization of sexual reproduction of trees with the dry season in Central America. Evolution 21:620–637.

Janzen, D.H. 1972. The uncertain future of the tropics. Nat. Hist. 81:80–89.

Janzen, D.H. 1982a. Cenizero tree (Leguminosae: Pithecellobium saman) delayed fruit development in Costa Rican deciduous forests. Amer. J. Bot. 69:1269–1276.

Janzen, D.H. 1982b. Variation in average seed size and fruit seediness in a fruit crop of a guanacaste tree (Leguminosae: Enterolobium cyclocarpum). Amer. J. Bot. 69:1169–1178.

Janzen, D.H. 1986a. Guanacaste National Park: Tropical Ecological and Cultural Restoration. Editorial Universidad Estatal a Distancia, San Jose, Costa Rica. 103 pp.

Janzen, D.H. 1986b. The future of tropical ecology. Ann. Rev. Ecol. Syst. 17:305–324.

Janzen, D.H. In press a. Natural history of a wind-pollinated Central American dry forest legume tree (Ateleia herbert-smithii Pittier). In C.H.Stirton and J.L.Zarucchi, eds. Advances in Legume Biology. Mo. Bot. Gard. Monogr. Syst. Bot.

Janzen, D.H. In press b. Ecological characterization of a Costa Rican dry forest caterpillar fauna. Biotropica.

Janzen, D.H. In press c. Management of habitat fragments in a tropical dry forest: Growth. Ann. Mo. Bot. Gard.

Janzen, D.H., and R.Liesner. 1980. Annotated check-list of plants of lowland Guanacaste Province, Costa Rica, exclusive of grasses and non-vascular cryptogams. Brenesia 18:15–90.

Murphy, P.G., and A.E.Lugo. 1986. Ecology of tropical dry forest. Ann. Rev. Ecol. Syst. 17:67–88.

Savage, J.M., and J.Villa. 1986. Introduction to the Herpetofauna of Costa Rica. Society for the Study of Amphibians and Reptiles, Athens, Ohio. 207 pp.

Stiles, F.G. 1983. Checklist of birds. Pp. 530–544 in D.H.Janzen, ed. Costa Rican Natural History. University of Chicago Press, Chicago.

Wilson, D.E. 1983. Checklist of mammals. Pp. 443–447 in D.H.Janzen, ed. Costa Rican Natural History. University of Chicago Press, Chicago.

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