Massachusetts will celebrate the 250th anniversary of the Revolutionary War. We asked reenactors, historians, and museum directors what lessons Americans can take from the founders.

Because Quakers had no formal minister or church ceremony ... “Thus shall God shed the blood of those persons who enslave their fellow creatures.” He pulled out the sword, raised the book ...

Essam Al-Sudani / AFP / Getty Images The world’s earliest documented water war happened 4,500 years ago ... Some experts say that these local feuds could escalate into full-scale armed conflicts ...