Buddhism has been described as a very pragmatic religion. It does not indulge first causes there is no theology, no worship of a deity or deification of the Buddha. Buddhism takes a very straightforward look at our human condition nothing is based on wishful thinking, at all. Everything that the Buddha taught was based on his own observation of the way things are. Everything that he taught can be verified by our own observation of the way things are.
Buddhism teaches that beings experience an endless cycle of death and rebirth. If a person doesn't attain goals in her lifetime, she will live again. This may seem like doctrinal trivia, but without reincarnation, certain basic ideas of Buddhism make no sense.
The Buddha explained that people live in a sea of suffering because of ignorance and greed. They are ignorant of the law of karma and are greedy for the wrong kind of pleasures. They do things that are harmful to their bodies and peace of mind, so they can not be satisfied or enjoy life.
For example, once children have had a taste of candy, they want more. When they can't have it, they get upset. Even if children get all the candy they want, they soon get tired of it and want something else. Although, they get a stomach-ache from eating too much candy, they still want more. The things people want most cause them the most suffering. Of course, there are basic things that all people should have, like adequate food, shelter, and clothing. Everyone deserve a good home, loving parents, and good friends. They should enjoy life and cherish their possessions without becoming greedy.