A worldview answers those questions. Until the fairly recent past, worldviews, and the ways they were understood, could be reasonably relied upon to differentiate very distinct ways of thinking and living. Thus, for example, it would have been inconceivable for a nation devoted to socialism to elect a free-market capitalist as its president/premier/prime minister. It would have been nonsensical for an organization devoted to the propagation of atheism to appoint a Southern Baptist minister as its chairperson. These are different and incompatible worldviews.
Insuperable problems arise when the same word is used to describe different and incompatible worldviews. Take the word "Christian," for example, which is now applied to people who are committed to breaking down racial barriers and to white supremacists, to people who are committed to telling the truth as one of the primary, nay, top 10 tenets of the faith and to people who lie indiscriminately, willy-nilly throughout the day, to people who deeply believe in the fundamental value and equality of women and to people who boast of grabbing women's genitalia, to people who desire to welcome, love and serve immigrants and to those who desire to keep immigrant children fenced off like animals in a zoo.
These are different worldviews masquerading under the same label. And the worldviews collide head-on when the current Vice President is invited to be the commencement speaker for an evangelical Christian college, which happened earlier today at Taylor University in Indiana.
Until they are acknowledged as different and incompatible worldviews, the same ridiculous charade will continue. Half the students and faculty will line up and salute, and wonder why half their neighbors are incredulous and inconsolable. And the other half of the students and faculty will be incredulous and inconsolable, arranging protests and marches and promising to stay away, while half their neighbors are shaking their heads in incomprehension and wondering what all the judgmental fuss is about. All of them call themselves Christians.