Economically speaking, there is no doubt that we live in a “disarranged” world, where the wealthy is getting richer, and the poor is getting poorer.
Main reason is the corruption; politically and economically, where the control and management are absent or misused in the governmental administrations, and the powerful countries control the “weak countries”, or they (powerful developed countries) try to create problems to destabilize the poor disorganized ones.
The level of corruption could be different among countries (developed and developing), but it is really “planted and strong” in the developing countries due to many reasons, and this is why the poverty and “management absence” are dominating in such countries, where the small “political governmental” party is rich, and the rest are poor or below the poverty line, despite those “poor countries” have sources for productions and raw materials, minerals and petroleum, but the absence of planning and management, and the greediness of the “business class” are changing the facts.
Some of those reasons helping the corruption in the developing countries:

1. The domination of a small ruling party over the national wealth, economy and power.
2. The commitment of the internal policy to external agenda and external policy.
3. The total absence of control, auditing, and management, and if they exist, they are all control by the political corrupted party.
4. Most of the developing countries are experiencing the case of religious fighting and unnecessary wars, which are most controlled by external policy.

Hence we can see that most of the poor people live in the developing countries specifically in Africa.

Some facts: with a population of 6,767,805,208 (Dec, 31, 2009)
Almost half the world — over three billion people — live on less than $2.50 a day.
At least 80% of humanity lives on less than $10 a day.
More than 80 percent of the world’s population lives in countries where income differentials are widening.
The poorest 40 percent of the world’s population accounts for 5 percent of global income, and the richest 20 percent accounts for three-quarters of world income.
According to UNICEF, 24,000 children die each day due to poverty.
Nearly a billion people entered the 21st century unable to read a book or sign their names.
Less than one per cent of what the world spent every year on weapons was needed to put every child into school by the year 2000 and yet it didn’t happen.

Knowing these facts we tell that the whole world wealth organization is not fair and accurate. Wealth is being spent on weapons and luxury unnecessary stuffs (like a golden car, or airplane...etc), and from the other side people are dying not finding a piece of bread. Clearly is that there is no management for what could be done and how could be spent.
I. Richest countries in the world*:

Country
GDP Per Capita ($)
Luxembourg
80,800
Qatar
75,900
Bermuda
69,900
Norway
55,600
Kuwait
55,300
UAE
55,200
Singapore
48,900
USA
46,000
Ireland
45,600
Equatorial Guinea
44,100

All the countries are fully or partially industrialized and none of them are agrarian. International financial services, tourism, petroleum and natural gas exports, electronic goods manufacturing, aiding movement of goods (as in the case of Singapore) and flourished service sector are the keystones behind this economic success.



II. Poorest countries in the world*:
Countries of the world do not have a uniform economy. With variations reaching to extreme ends, countries economic conditions can be mapped on the basis of their GDP per capita. GDP is the value of all final goods and services produced within a country in a given year. A country with a GDP per capita of $765 dollars or less is defined as a low-income or poor country. And it is on the basis of this GDP, that the top ten poorest countries map has been prepared. Industrialization, overpopulation, investment, infrastructure, geography, resources, colonialism, education, government and debt are few of the most critical aspects that make poor countries remain poor.


Rank
Country
GDP - per capita
1
Congo, Democratic Republic of the
$ 300
2
Zimbabwe
$ 500
3
Sierra Leone
$ 500
4
Malawi
$ 600
5
Tanzania
$ 600
6
Burundi
$ 600
7
Congo, Republic of the
$ 700
8
Somalia
$600
9
Comoros
$ 600
10
Eritrea
$ 700
11
Ethiopia
$ 700
12
Afghanistan
$ 700
13
Niger
$ 700
14
Yemen
$ 800
15
Madagascar
$ 800
16
Guinea-Bissau
$ 800
17
Zambia
$ 800
18
Kiribati
$ 800
19
Nigeria
$ 900
20
Mali
$ 900

*GDP or the Gross Domestic Product is the total market value of all final goods and services produced in a country in a given year. However we can see that deep gab in GDP between poor and rich country, between somebody who is able to make more than $ 80,000 US a year, and another is making $300 US.


Sources:
* Internet stats
* Global issues.org