Why is the World divided into developed and developingng countries?

Why are some countries said to be developed while others are said to be developing? Many of those that are said to be developing have cultures that are older than those of the so-called developed ones. Has progress ended in n the"developed" countries? Some people think that technological advances are what matters. There are other ways in which countries develop. Being able to care for the people and the environment should be signs of development not how much technology a country has developed. The"developed" countries tend to look down on the"developing" countries and to exploit them. We are all on the same planet, and we all need to care for each other and to treat each other with respect.