What are the similarities and differences of Ralph and Jack in Lord of the Flies?

Ralph and Jack are both of a similar age and they are probably the two biggest and tallest boys on the island. Both boys seem incisive and like to put into action any decision which has been reached as soon as possible. Both boys seem able to command repect and support. They differ in the ways in which they gain support, their leadership styles and the goals which they wish to acheive. Ralph believes in leadership by example and by a concensus of opinion. He organises meetings, where joint decision are reached, and he is prepared to work, building huts and carrying firewood, alongside the other boys. Ralph's stated aims are to get rescued and also to have fun. In the meantime he feels a sense of social responsiblity towards the littluns and sees the need to prepare for less favourable conditions, by building shelters and collecting water to be placed close to the shelters. Jack, in contrast, thinks he alone should rule. He thinks that some people should know when to leave decisions to those more capable of making them, namely himself. Jack expects the others to carry out his commands immediately and without discussion, under the threat of physical punishment. Jack is more than happy to sit enthroned while others carrry out his orders. Jack essentially has one aim in life and that is to impose his will on others, whether they be pigs or other boys, he feels superior to them all and feels they are only there to serve whatever purpose he chooses for them.