If you are standing in your shower (shower thoughts) and try to travel 200 years back, your location in space is not where the solar system, nor the earth was 200 years ago. So there’s that…
Physics-wise, the only conceived ways to time travel to the past is either FTL travel or wormholes, with the latter requiring “exotic matter” to stabilize, and even then, you can’t go back to any arbitrary time. Nobody knows if exotic matter actually exists. FTL seems off the board.
There are mechanisms in place to keep history and the past safe for historians.
If you are standing in your shower (shower thoughts) and try to travel 200 years back, your location in space is not where the solar system, nor the earth was 200 years ago. So there’s that…
Physics-wise, the only conceived ways to time travel to the past is either FTL travel or wormholes, with the latter requiring “exotic matter” to stabilize, and even then, you can’t go back to any arbitrary time. Nobody knows if exotic matter actually exists. FTL seems off the board.
There are mechanisms in place to keep history and the past safe for historians.
I think our global economy is safe.