Well, this can be a long topic - but I'll cut it short.

Malaysia Proton/National Car policy (i.e. high tax on imported car) is a legacy, started almost 30 years ago.
USA's law that allows possession of guns, is a legacy started as far as 1792.
Apartheid was a legacy in South Africa, started in 1948, ended in 1994.
Malaysia's Social Contract were agreements made by the country's founding fathers in the Constitution - it is definitely a legacy to Malaysia.
Dynasties in China were legacy, until the formation of Republic of China in 1912.

One thing for sure - these legacies help to define how the country works, how it looks, and how people will live.

But as the world progresses - things change.
Legacy maybe important, but is not necessarily relevant to the present time.

Some, or even many, may have affection on the legacies - but let's look at the real needs of the people, you will know why some of the legacies that I mentioned above, has become history.

Two challenges before giving up a legacy:
1) How to convince people (or maybe the minors) that it is no longer relevant
2) What are the alternatives available?