What will happen if the executive branch had all the power?

If the executive branch held all the power, it could lead to authoritarian rule, undermining democracy and the system of checks and balances essential for governance. This concentration of power might result in the suppression of dissent, violation of individual rights, and a lack of accountability, as there would be no independent judiciary or legislative oversight. Ultimately, such a scenario could destabilize society, erode public trust in government, and diminish citizens' freedoms.