What two properties keep earth in orbit around the sun?

Why are people more likely to marry individuals with social and cultural backgrounds very similar to their own? a. parents and other family members always exert pressure to marry within the group. b. people spend a great deal of time alone, and therefore can have few opportunities for meeting people. c. people develop irrational fears of out-group members and are scared to date them. d. people have greater access to individuals like themselves.

Give an example of a situation in which an individual's pursuit of economic self-interest may not benefit but instead harm the rest of society

Does increased security engender feelings of increased safety or does it increase the fears that people have?