If an economy is bad it's assumed that it's because the leaders of the country do not set right economic policies in place.
If a nation is at war it's assumed that it's because of the decision of the leaders.
If the educational system is faulty it's assumed that it's because of the decision of the leaders and even when a country is doing well in the global stage in sports, academics and other areas, it's still all about the leaders.
Is it the leaders of a country that makes them good, bad, at peace or in war? Or is it the led who are the majority that determines what becomes of a nation.
If everyone decides to manage a country, it will not be acceptable, it will not be possible to conduct the country. So to conduct the country someone have to take the responsibility among the people whom we know as leader. Generally in a democratic countries, multiple leaders are elected and there is a vote to choose a leader who can win through that vote will get the responsibility of the country. Now after taking charge if that leader strives to improve his nation then he will lead his country in the same way. After some leaders get responsibility, there are many who fill their own pockets by doing injustice and corruption and some leaders who work only for their country.
But it is very difficult to get elected, because when it comes to election time, everyone is well, and once a party gets power, that party starts corrupting. After gaining power they change color like chameleons. But all politicians are not the same, some parties are very good who really want to work for the country, but the people have to choose the right party.