A country without leader is very hard because a success of a country depends on leadership,without leader no one can direct us with our vision ,the community is unorganize and and theres no one who can lead us towards great accomplishments.I think the world without our world leaders wouldn't be that easy. They are the ones who guide us and lead us. They are like sheperds, without them we'll get lost. They may commit mistakes sometime but that is because their just like us. They're not perfect and they also commit mistakes.They lead our country into the right path.
Well it will surely the world will become miserable, perhaps each nations could be in trouble or war. But of course, its not going to be happen anyway. As you can see all countries had their own leader to lead them in a better way of life.Everywhere when required a team or group there must be required  a team leader .because without a leader there is nothing possible and also the leader must more genius then their team members because he has  control all the process which will be done by team members.so just like for a country there must be a genius leader need to develop their country.Leaders can't prevent terrorist attacks. They can take strong action against terrorism, and thereby reduce the incidence of terrorist attacks. But apart from that if the terrorism needs to be eradicated, then we need to take action at the root level. The clerics and religious leaders who promote terrorism must be exterminated and those religious places used by these radicals needs to be demolished.