Social aspects History 39 Human-animal relationships 24 Dogs 13 Environmental aspects 13 Economic aspects 11 Agriculture 10 more ... Moral and ethical aspects 7 Dog owners 6 Environmental conditions 6 Animal welfare 5 Behavior 5 Food 5 Pets 5 Animals and civilization 4 Forests and forestry 4 Organic farming 4 Political aspects 4 Psychology 4 Social conditions 4 Social life and customs 4 Forest management 3 Health aspects 3 Horses 3 National parks and reserves 3 Nature conservation 3 Race relations 3 Social change 3 Soils 3 Training 3 less ...