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He was a professor at the University of Wisconsin and is best known for his book ''A Sand County Almanac'' (1949), which sold over a million copies.

He was a professor at the University of Wisconsin and is best known for his book ''A Sand County Almanac'' (1949), which sold over a million copies.

==career==

==Career==

In 1909 Leopold, a recent graduate of the Yale Forest School, was assigned to the Forest Service's District 3 in the Arizona and New Mexico territories. He was first a forest assistant at

In 1909 Leopold, a recent graduate of the Yale Forest School, was assigned to the Forest Service's District 3 in the Arizona and New Mexico territories. He was first a forest assistant at

the Apache National Forest in the Arizona Territory. In 1911, he was transferred to the Carson National Forest in northern New Mexico. Leopold's career, which kept him in New Mexico until 1924, included developing the first comprehensive management plan for the Grand Canyon, writing the Forest Service's first game and fish handbook, and proposing Gila Wilderness Area, the first national wilderness area in the Forest Service system. In 1933 he became Professor of Game Management in the Agricultural Economics Department at the University of Wisconsin, Madison. He purchased eighty acres in the sand country of central Wisconsin. The once-forested region had been logged, swept by repeated fires, overgrazed by dairy cows, and left barren. There he put his theories to work in the field, and eventually authored his

the Apache National Forest in the Arizona Territory. In 1911, he was transferred to the Carson National Forest in northern New Mexico. Leopold's career, which kept him in New Mexico until 1924, included developing the first comprehensive management plan for the Grand Canyon, writing the Forest Service's first game and fish handbook, and proposing Gila Wilderness Area, the first national wilderness area in the Forest Service system. In 1933 he became Professor of Game Management in the Agricultural Economics Department at the University of Wisconsin, Madison. He purchased eighty acres in the sand country of central Wisconsin. The once-forested region had been logged, swept by repeated fires, overgrazed by dairy cows, and left barren. There he put his theories to work in the field, and eventually authored his

best-selling ''A Sand County Almanac'' (1949), which he finished just before his death.

best-selling ''A Sand County Almanac'' (1949), which he finished just before his death.

==Ideas==

==Ideas==

Early on Leopold was assigned to hunt and kill bears, wolves, and mountain lions in New Mexico. Local ranchers hated these predators because of livestock losses. However, Leopold came to respect the animals. He developed an ecological ethic that replaced the earlier "colonial Judeo-Christian wilderness ethic." Rethinking the importance of predators in the balance of nature resulted in the return of bears and mountain lions to New Mexico wilderness areas.   

Early on Leopold was assigned to hunt and kill bears, wolves, and mountain lions in New Mexico. Local ranchers hated these predators because of livestock losses. However, Leopold came to respect the animals. He developed an ecological ethic that replaced the earlier "colonial Judeo-Christian wilderness ethic." Rethinking the importance of predators in the balance of nature resulted in the return of bears and mountain lions to New Mexico wilderness areas.