Yes. Part of civilization is what as known as the "infrastructure", the plumbing and water brought to houses, the paved roads and road maintenance, the electric lights and the sanitation. If you notice the pictures of 3rd-world countries, their biggest issues are not having running water or electricity. People's taxes in our country pay for running water in pipes under the city streets and drains for rainwater to prevent flooding. City and state taxes pay for dams for providing water and for generating electricity. Taxes pay for police and fire departments and emergency vehicles and people to help take care of emergencies. Having government means that someone is in charge to see that laws are obeyed, especially laws regulating labor, so people are no longer enslaved again, laws concerning proper building codes, so houses and buildings are built properly and won't fall down or break apart any old time, and people are in charge of traffic laws to prevent car accidents. The government is also in charge of protecting our country through our army and navy. because of those protections we have time to do other things and the relative safety to travel around. So yes, government is very important to our society.