Because we humans are made from zygote which is formed by a combination of two haploid gametes !!
When the sperm and ova meet there is a crossing over type phenomenon which decides what will be the phenotype !! so we somewhere distinct from both our parents !!
The Tang Dynasty of China when faced with rebellion from General An Lushan in their northern territories sought outside support from mercenary forces. This was done a number of times during the rebellion, these mercenaries were typically Arab, however, we also have examples of soldiers brought from Uighur to fight with the Tang and numbered in the thousands in the fight against Lushan's forces.
With the help of mercenary forces, the Tang were able to take back several important capital cities of China and effectively eliminated the rebellion of Lushan, as well as his later supporters and successors.
The Boxer Rebellion or the Yihetuan Uprising is an anti-imperialist group of the Qing Dynasty. The Chinese uprising rose as an opposition to Qing Dynasty, oppression of Christianity and pro-nationalism. This rebellion has led to the participation of 8 foreign countries that created, even more, bloodshed in the country.
Nowadays with new technologies and new ways of communication politicians promote themselves in different ways as the ones from the past. Those new ways can sometimes benefit their campaigns but at the same time be dangerous. On one hand, journalism is in charge of providing reliable information along with judging politicians. However, journalism has been replaced by phone cameras and normal citizens who provided real information in real time without edition. On the other hand, politicians make good use of internet tools such as webpages, which help them keep direct contact with voters. Moreover, a modern mode of communication is the cooperation of celebrities like musicians and actors or actresses who promote politicians through expensive campaigns or artistic events.
