We are changing the Earth faster than ever. Large scale building of roads and homes is using an ever larger percentage of land as our need to grow and expand never ceases.
Affecting the Earth on a far larger scale is our use of land for agriculture for food production and now on an increasing scale, fuel. In many cases the use is not so dramatic as building but there are still significant changes in the local ecology when land is used for agriculture compared to being left wild.

Deer
The biodiversity of land is far lower when converted to agriculture. The wide open spaces leave little room for small animals and remove most of the natural plant life too except in the relatively small areas of hedgerows. Compare this against the huge diversity of natural woodland for example, which once covered a large percentage of many areas of the world, and the difference is stark.
Posted by jtwigge 

We are all individuals and we are all part of teams. Note that in this context I am using the word team in a fairly generic sense to mean any group of people that collaborates in some way. The extent to which each individual enters into team behaviour varies from the individual that escapes to the mountains and has very little contact with the rest of society right through to the party extrovert who wants constant interaction with other people.