Lord Acton was a very smart man who lived a long time ago. He was born in the year 1834 and he died in the year 1902. He was a historian, which means he studied things that happened a long time ago.
One of the things that Lord Acton believed was that power can be a bad thing. When people have too much power, they can become very selfish and make bad choices. He said that "power tends to corrupt, and absolute power corrupts absolutely". This means that when one person has too much power, they can become very mean or cruel and do things that aren't very nice.
Lord Acton also believed that it was important for people to have a say in how things are run. This means that everyone should get a chance to speak up if they don't like something. He thought that if people could vote, then they would have a better chance of making things fair for everyone.
Overall, Lord Acton was a very important person who taught us that power can be a bad thing if it's not used well. He believed that everyone should have a say in how things are run so that things can be fair for everyone.