Answer: People subscribe to different Ideologies
Step-by-step explanation:
A Unanimous vote refers to a situation where everyone who can vote on something all vote in the same way.
In matters of public policy, it is nearly impossible to get such a vote because people are different and in their difference they subscribe to different ideologies that clash with the others'.
It is for this reason that people join different political parties i.e. Republicans and Democrats and why in turn these parties have differing views on how things should be done.
For instance, the issue of gun regulation. There are many people for it as they say it will reduce the violence plaguing the country but at the same time there are people who are against it as they believe that guns can protect people from criminals.
Another is the issue of abortion. There have been many rallies in support of the practice because those people believe that it is right for women to choose what to do with their bodies. At the same time however, many people believe that abortion is murder. The likelihood of these two groups reaching a consensus for which a unanimous vote results, is quite unlikely.