Neolitihic revolution refers to the revolution that transform mankind's lifestyle from hunting/gathering into agricultural.
In an agricultural society, each member need to coordinate with one another in order to determine land's ownership and trading regulations.
Because of this, a mediator such as government is needed in order to make everything fair.
Answer: More usually called the Philippine-American War or the Philippine War, the Philippine Insurrection (1899–1902) was America's first conflict of the twentieth century. On 1 May 1898, at the beginning of the Spanish-American War Commodore George Dewey sank the Spanish fleet in Manila Bay, Philippines.