Another effect of the spread of Islam was an increase in trade. Unlike early Christianity, Muslims were not reluctant to engage in trade and profit; Muhammad himself was a merchant. As new areas were drawn into the orbit of Islamic civilization, the new religion provided merchants with a safe context for trade.
The state of California is bound by the USA constitution under the doctrine of federalism, which points out that the state's constitution is subservient to the federal laws. The state has no foreign powers to enter into any treaty with foreign powers,as that is a reserved power of the federal government. should there be a conflict between a state laws and the federal government,the latter's shall supersede,which implies that California can not make any laws to effect any such a desire. In addition, the California state is a member of the USA nation, whereby its residents shares common goals and culture with the rest of the populace.
Many countries wanted to control over many economic activities in other countries as well as utilize other countries for cheap labor. In addition, some countries wanted to explore the world and conquer for their homeland while other countries thought that their own country and race was superior to all other countries and therefore believed it was needed that they invade other countries and educate them as well as some countries practicing imperialism to convert people to their religion.