Be sure to choose only the arguments you will be able to illustrate and develop in your essay. Feel free to revisit your thesis statement and rewrite it while you work on your paper and want to add or change something. If you decide to use the thesis statement suggested above, you will need to write one paragraph discussing a relationship between literacy of population and economic development of the country. Another paragraph should shed light on the current situation in Africa. Try to find the latest stats on education and economy in Africa. Numbers often speak louder than words when you need to illustrate your point and to persuade readers to share your position. The third paragraph should address the question of humanitarian aid and the attitude of the locals to it. Finally, make sure to repeat your thesis statement in the conclusion part, but use different wording.
Don Ihde called the hypothesis being 'hyped' and referred to clear evidence about the use of optical tools by, ., Albrecht Dürer and Leonardo da Vinci and others. As well the 1929 Encyclopædia Britannica  contains an extensive article on the camera obscura and cites Leon Battista Alberti as the first documented user of the device as early as 1437.  Ihde states abundant evidence for widespread use of various technical devices at least in the Renaissance and . in Early Netherlandish painting .  Jan van Eyck 's 1434 painting Arnolfini Portrait shows a convex mirror in the centre of the painting. Van Eyck also left his signature above this mirror,  showing the importance of the tool. The painting includes a crown glass window in the upper left side, a rather expensive luxury at the time. Van Eyck was rather fascinated by glass and its qualities, which was as well of high symbolic importance for his contemporaries.  Early optical instruments were comparatively expensive in the Medieval age and the Renaissance.